/* roulang page: index */
:root {
    --forest-950: #071F1A;
    --forest-900: #0A2E27;
    --forest-800: #0F4035;
    --forest-700: #175944;
    --forest-600: #1F6F55;
    --ember-600: #DD4B25;
    --ember-500: #F05A2A;
    --ember-400: #FF7A3C;
    --sun-400: #FFB45C;
    --leaf-400: #2EC286;
    --paper-50: #FAF7F1;
    --paper-100: #F3EDE2;
    --sand-200: #E7DCCB;
    --ink-900: #16211D;
    --ink-600: #3D4A44;
    --ink-400: #6E7972;
    --line-100: #E5DED1;
    --radius-card: 1.25rem;
    --shadow-card: 0 1px 3px rgba(20,30,25,0.06), 0 12px 32px rgba(20,30,25,0.08);
    --shadow-lift: 0 8px 24px rgba(20,30,25,0.16);
  }

  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    background: var(--paper-50);
    color: var(--ink-900);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
  }

  img {
    max-width: 100%;
    display: block;
  }

  a {
    color: inherit;
    text-decoration: none;
  }

  button {
    font-family: inherit;
    border: none;
    background: none;
    cursor: pointer;
  }

  .write-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 1rem;
    padding-right: 1rem;
  }

  @media (min-width: 640px) {
    .write-container {
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
  }

  .text-brand-gradient {
    background: linear-gradient(135deg, var(--ember-600) 0%, var(--ember-400) 100%);
  }

  .bg-brand-gradient {
    background: linear-gradient(135deg, var(--ember-600) 0%, var(--ember-400) 100%);
  }

  .bg-night-gradient {
    background: linear-gradient(180deg, var(--forest-950) 0%, var(--forest-800) 100%);
  }

  .text-vertical-rl {
    writing-mode: vertical-rl;
    letter-spacing: 0.3em;
  }

  .hide-scrollbar {
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .hide-scrollbar::-webkit-scrollbar {
    display: none;
  }

  .hover-lift {
    transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease, background-color .3s ease;
  }

  .hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lift);
  }

  .focus-ring:focus-visible {
    outline: 2px solid var(--sun-400);
    outline-offset: 2px;
    border-radius: 0.5rem;
  }

  .fade-in-down {
    animation: fadeInDown .6s ease both;
  }

  @keyframes fadeInDown {
    from {
      opacity: 0;
      transform: translateY(-12px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .flame-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 999px;
    background: var(--ember-500);
    box-shadow: 0 0 0 4px rgba(240, 90, 42, .14);
  }

  .data-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, .92);
    color: var(--forest-800);
    font-size: 13px;
    line-height: 1.6;
    border: 1px solid rgba(255, 255, 255, .2);
    box-shadow: 0 4px 16px rgba(0, 0, 0, .08);
  }

  .data-badge.on-dark {
    background: rgba(255, 255, 255, .1);
    color: #fff;
    border-color: rgba(255, 255, 255, .18);
  }

  .checkline {
    transition: background-color .25s ease, box-shadow .25s ease;
  }

  .checkline:hover {
    background: #FFF7ED;
  }

  .checkline:hover .checklink {
    opacity: 1;
    transform: translateX(0);
  }

  .checklink {
    opacity: 0;
    transform: translateX(-6px);
    transition: opacity .25s ease, transform .25s ease;
  }

  .card-img-cover {
    object-fit: cover;
    width: 100%;
    height: 100%;
    transition: transform .45s ease;
  }

  .card-img-wrap {
    overflow: hidden;
  }

  .card-img-wrap:hover .card-img-cover {
    transform: scale(1.03);
  }

  .video-card-play {
    transition: opacity .25s ease, transform .25s ease;
    opacity: 0;
    transform: scale(.9);
  }

  .video-card-wrap:hover .video-card-play {
    opacity: 1;
    transform: scale(1);
  }

  .star-ico {
    color: var(--sun-400);
    font-size: 14px;
    letter-spacing: 1px;
  }

  .faq-answer {
    display: none;
  }

  .faq-item.open .faq-answer {
    display: block;
  }

  .faq-item.open {
    border-color: rgba(240, 90, 42, .5);
    box-shadow: 0 0 0 1px rgba(240, 90, 42, .12);
  }

  .faq-item.open .faq-arrow {
    transform: rotate(180deg);
    color: var(--ember-500);
  }

  .subject-link {
    transition: background-color .2s, color .2s;
  }

  .subject-link:hover {
    background: rgba(240, 90, 42, .1);
    color: var(--ember-600);
  }

  .subject-link.active {
    background: rgba(240, 90, 42, .14);
    color: var(--ember-600);
  }

  .footer-list a {
    position: relative;
    display: inline-block;
    padding-left: 0;
    transition: color .2s, padding-left .2s;
  }

  .footer-list a:hover {
    color: #FFD8C2;
    padding-left: 14px;
  }

  .footer-list a::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 0;
    height: 10px;
    background: var(--ember-400);
    border-radius: 999px;
    transform: translateY(-50%);
    transition: width .25s ease;
  }

  .footer-list a:hover::before {
    width: 4px;
  }

  .table-card {
    border-radius: 16px;
    border: 1px solid var(--line-100);
    overflow: hidden;
  }

  .table-card table {
    border-collapse: collapse;
    width: 100%;
  }

  .news-card {
    transition: box-shadow .25s ease, transform .25s ease, border-color .25s ease;
  }

  @media (hover: hover) {
    .news-card:hover {
      box-shadow: var(--shadow-lift);
      transform: translateY(-4px);
      border-color: rgba(240, 90, 42, .18);
    }

    .news-card:hover .arrow-svg {
      transform: translateX(4px);
      color: var(--ember-500);
    }
  }

  .arrow-svg {
    transition: transform .22s ease, color .22s ease;
  }

  .mask-fade-right {
    mask-image: linear-gradient(90deg, transparent 0%, #000 2%, #000 98%, transparent 100%);
  }

  .hero-media-cover {
    object-fit: cover;
    width: 100%;
    height: 100%;
  }

  .line-clamp-me {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .line-clamp-single {
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .post-title-dot {
    width: 8px;
    height: 8px;
    background: var(--ember-500);
    border-radius: 999px;
    flex: 0 0 8px;
    margin-top: .68em;
  }

/* roulang page: category1 */
:root {
            --forest-950: #071F1A;
            --forest-900: #0A2E27;
            --forest-800: #0F4035;
            --forest-700: #175944;
            --forest-600: #1F6F55;
            --ember-600: #DD4B25;
            --ember-500: #F05A2A;
            --ember-400: #FF7A3C;
            --sun-400: #FFB45C;
            --leaf-400: #2EC286;
            --paper-50: #FAF7F1;
            --paper-100: #F3EDE2;
            --sand-200: #E7DCCB;
            --ink-900: #16211D;
            --ink-600: #3D4A44;
            --ink-400: #6E7972;
            --line-100: #E5DED1;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 120px;
        }

        body {
            margin: 0;
            background: var(--paper-50);
            color: var(--ink-900);
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
            font-size: 16px;
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }

        ul,
        ol,
        dl,
        dd {
            margin: 0;
            padding: 0;
            list-style: none;
        }

        img {
            display: block;
            max-width: 100%;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .22s ease, background .22s ease, box-shadow .22s ease, transform .22s ease;
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
        }

        button {
            border: none;
            background: none;
            cursor: pointer;
        }

        :focus-visible {
            outline: 2px solid var(--sun-400);
            outline-offset: 3px;
        }

        .write-container {
            width: 100%;
            max-width: 1200px;
            margin-right: auto;
            margin-left: auto;
            padding-right: 1rem;
            padding-left: 1rem;
        }

        @media (min-width: 640px) {
            .write-container {
                padding-right: 1.5rem;
                padding-left: 1.5rem;
            }
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
        }

        .site-header .top-bar {
            background: rgba(250, 247, 241, 0.94);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(229, 222, 209, .8);
        }

        .site-header .channel-bar {
            background: rgba(250, 247, 241, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(229, 222, 209, .9);
        }

        .brand-name {
            letter-spacing: -0.01em;
        }

        .brand-mark {
            display: grid;
            place-items: center;
            width: 30px;
            height: 30px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--ember-600), var(--ember-400));
            color: #fff;
            font-size: 16px;
            font-weight: 800;
            box-shadow: 0 4px 12px rgba(221, 75, 37, .25);
        }

        .subject-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
            border-radius: 999px;
            padding: 6px 13px;
            font-size: 14px;
            font-weight: 600;
            color: var(--forest-900);
        }

        .subject-link:hover {
            background: var(--paper-100);
            color: var(--forest-700);
        }

        .subject-link.active {
            background: rgba(240, 90, 42, .1);
            color: var(--ember-600);
            box-shadow: inset 0 0 0 1px rgba(240, 90, 42, .18);
        }

        .channel-hot a {
            color: var(--ink-400);
            font-size: 13px;
            font-weight: 500;
        }

        .channel-hot a:hover {
            color: var(--ember-600);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 46px;
            gap: 8px;
            border-radius: 999px;
            padding: 11px 24px;
            background: linear-gradient(135deg, var(--ember-600), var(--ember-400));
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            box-shadow: 0 8px 20px rgba(221, 75, 37, .2);
            transition: transform .2s ease, box-shadow .2s ease, filter .2s ease;
        }

        .btn-primary:hover {
            filter: brightness(1.06);
            transform: translate(1px, -1px);
            box-shadow: 0 12px 28px rgba(221, 75, 37, .28);
            color: #fff;
        }

        .btn-primary:active {
            transform: scale(.98);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 46px;
            gap: 8px;
            border-radius: 999px;
            padding: 11px 24px;
            background: #fff;
            border: 2px solid rgba(15, 64, 53, .4);
            color: var(--forest-800);
            font-size: 15px;
            font-weight: 700;
        }

        .btn-secondary:hover {
            background: var(--paper-100);
            border-color: var(--forest-600);
            transform: translate(1px, -1px);
            color: var(--forest-900);
        }

        .btn-secondary:active {
            transform: scale(.98);
        }

        .anchor-pill {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 38px;
            gap: 7px;
            border-radius: 999px;
            padding: 7px 16px;
            background: rgba(240, 90, 42, .08);
            color: var(--forest-900);
            border: 1px solid rgba(240, 90, 42, .18);
            font-size: 13px;
            font-weight: 600;
        }

        .anchor-pill:hover {
            background: rgba(240, 90, 42, .16);
            color: var(--ember-600);
            transform: translateY(-1px);
        }

        .badge-dot {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            border-radius: 999px;
            background: #fff;
            box-shadow: 0 1px 3px rgba(20, 30, 25, .08);
            padding: 6px 13px;
            color: var(--forest-800);
            font-size: 13px;
            font-weight: 600;
        }

        .badge-dot::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 999px;
            background: var(--ember-500);
            flex: none;
        }

        .badge-chip {
            display: inline-flex;
            align-items: center;
            border-radius: 10px;
            padding: 3px 9px;
            font-size: 12px;
            font-weight: 600;
            background: var(--paper-100);
            color: var(--ink-600);
        }

        .section-kicker {
            display: inline-block;
            color: var(--ember-600);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: .04em;
        }

        .h2-title {
            margin: 0;
            font-size: clamp(1.5rem, 2.4vw, 2.2rem);
            line-height: 1.3;
            color: var(--forest-950);
            font-weight: 800;
            letter-spacing: -0.02em;
        }

        .intro-text {
            color: var(--ink-600);
            font-size: 16px;
            line-height: 1.9;
        }

        .step-title {
            margin: 0;
            font-size: 18px;
            line-height: 1.45;
            color: var(--forest-950);
            font-weight: 700;
        }

        .shadow-card {
            box-shadow: 0 1px 3px rgba(20, 30, 25, 0.06), 0 12px 32px rgba(20, 30, 25, 0.08);
        }

        .feature-card-hover {
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
        }

        .feature-card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(20, 30, 25, 0.16);
        }

        .quick-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            border: 1px solid var(--line-100);
            border-radius: 24px;
            padding: 17px 17px 17px 18px;
            background: var(--paper-50);
            transition: background .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease;
        }

        .quick-item:hover {
            background: #fff;
            border-color: rgba(240, 90, 42, .35);
            box-shadow: 0 8px 24px rgba(20, 30, 25, 0.1);
            transform: translateY(-2px);
        }

        .quick-item .check-icon {
            display: grid;
            place-items: center;
            flex: none;
            width: 23px;
            height: 23px;
            margin-top: 4px;
            border-radius: 999px;
            background: rgba(46, 194, 134, .16);
            color: #168b63;
            font-size: 12px;
        }

        .faq-panel {
            background: var(--paper-50);
            border: 1px solid var(--line-100);
            border-radius: 18px;
            padding: 20px 22px;
        }

        .faq-panel summary {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            cursor: pointer;
            color: var(--forest-950);
            font-weight: 700;
            font-size: 16px;
            line-height: 1.6;
            list-style: none;
        }

        .faq-panel summary::-webkit-details-marker {
            display: none;
        }

        .faq-panel summary::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 14px;
            color: var(--ember-500);
            transition: transform .3s ease;
        }

        .faq-panel[open] {
            border-color: rgba(240, 90, 42, .4);
            box-shadow: 0 8px 20px rgba(20, 30, 25, .06);
        }

        .faq-panel[open] summary::after {
            transform: rotate(180deg);
        }

        .faq-panel .faq-answer {
            margin-top: 12px;
            color: var(--ink-600);
            font-size: 15px;
            line-height: 1.8;
        }

        .footer-night {
            background: linear-gradient(180deg, #071F1A 0%, #0A2E27 60%, #0F4035 100%);
        }

        .footer-list a {
            position: relative;
            color: rgba(250, 247, 241, .72);
            line-height: 1.5;
        }

        .footer-list a:hover {
            color: #fff;
            padding-left: 11px;
        }

        .footer-list a::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            width: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--ember-400);
            transform: translateY(-50%);
            transition: width .2s ease;
        }

        .footer-list a:hover::before {
            width: 6px;
        }

        .night-text-muted {
            color: rgba(250, 247, 241, .66);
        }

        #mobileMenu {
            background: var(--paper-50);
            border-bottom: 1px solid var(--line-100);
        }

        #mobileMenu .mobile-nav-links a {
            display: flex;
            align-items: center;
            width: 100%;
            min-height: 46px;
            border-radius: 14px;
            padding: 11px 14px;
            font-size: 15px;
            font-weight: 600;
            color: var(--forest-900);
        }

        #mobileMenu .mobile-nav-links a.active {
            background: rgba(240, 90, 42, .1);
            color: var(--ember-600);
        }

        #mobileMenu .mobile-nav-links a:hover {
            background: var(--paper-100);
        }

        .scene-card {
            border-radius: 26px;
            padding: 26px;
            color: var(--paper-100);
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .12);
        }

        .scene-card .scene-index {
            display: grid;
            place-items: center;
            width: 34px;
            height: 34px;
            border-radius: 22px;
            background: rgba(255, 172, 92, .22);
            color: #ffb45c;
            font-size: 16px;
            font-weight: 800;
        }

        .scene-card h3 {
            color: #fff;
            font-size: 18px;
            margin: 20px 0 0;
            font-weight: 700;
            line-height: 1.5;
        }

        .scene-card p {
            color: rgba(250, 247, 241, .7);
            font-size: 14px;
            line-height: 1.85;
            margin-top: 10px;
        }

        .scene-card:hover {
            background: rgba(255, 255, 255, .1);
            transform: translateY(-4px);
            transition: transform .25s ease, background .25s ease;
        }

/* roulang page: article */
:root {
  --forest-950: #071F1A;
  --forest-900: #0A2E27;
  --forest-800: #0F4035;
  --forest-700: #175944;
  --forest-600: #1F6F55;
  --ember-600: #DD4B25;
  --ember-500: #F05A2A;
  --ember-400: #FF7A3C;
  --sun-400: #FFB45C;
  --leaf-400: #2EC286;
  --paper-50: #FAF7F1;
  --paper-100: #F3EDE2;
  --sand-200: #E7DCCB;
  --ink-900: #16211D;
  --ink-600: #3D4A44;
  --ink-400: #6E7972;
  --line-100: #E5DED1;
  --shadow-card: 0 1px 3px rgba(20,30,25,0.06), 0 12px 32px rgba(20,30,25,0.08);
  --shadow-hover: 0 8px 24px rgba(20,30,25,0.16);
  --brand-gradient: linear-gradient(135deg, #DD4B25 0%, #FF7A3C 100%);
  --night-gradient: linear-gradient(180deg, #071F1A 0%, #0F4035 100%);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--paper-50);
  color: var(--ink-900);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "tnum";
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--sun-400);
  outline-offset: 2px;
  border-radius: 10px;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

.write-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.bg-night-gradient {
  background: var(--night-gradient);
}

.bg-brand-gradient {
  background: var(--brand-gradient);
}

.shadow-card {
  box-shadow: var(--shadow-card);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(250, 247, 241, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-100);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  flex: 0 0 36px;
  border-radius: 12px;
  background: var(--brand-gradient);
  color: #fff;
  font-weight: 800;
  font-size: 17px;
  box-shadow: 0 6px 16px rgba(240, 90, 42, 0.28);
}

.brand-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 800;
  color: var(--forest-950);
  letter-spacing: -0.01em;
}

.subject-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 7px 13px;
  font-size: 14px;
  font-weight: 600;
  color: var(--forest-900);
  white-space: nowrap;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.subject-link:hover {
  background: rgba(240, 90, 42, 0.09);
  color: var(--ember-600);
}

.subject-link.active {
  background: var(--brand-gradient);
  color: #fff;
  box-shadow: 0 8px 18px rgba(240, 90, 42, 0.24);
}

.badge-soft {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line-100);
  padding: 5px 11px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-600);
  box-shadow: 0 1px 3px rgba(20, 30, 25, 0.04);
}

.badge-soft::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--ember-500);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  border-radius: 999px;
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--brand-gradient);
  color: #fff;
  box-shadow: 0 8px 20px rgba(240, 90, 42, 0.26);
}

.btn-primary:hover {
  transform: translate(1px, -1px);
  box-shadow: 0 12px 26px rgba(240, 90, 42, 0.32);
  filter: brightness(1.04);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-outline {
  background: #fff;
  color: var(--forest-700);
  border: 2px solid var(--forest-700);
}

.btn-outline:hover {
  background: var(--forest-700);
  color: #fff;
  border-color: var(--forest-700);
}

.btn-outline:active {
  transform: scale(0.98);
}

.btn-ghost {
  background: var(--paper-100);
  color: var(--forest-800);
}

.btn-ghost:hover {
  background: rgba(240, 90, 42, 0.12);
  color: var(--ember-600);
}

.article-empty-state {
  border: 1px dashed var(--sand-200);
  border-radius: 24px;
  background: #fff;
  padding: 64px 24px;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.article-empty-icon {
  display: grid;
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  place-items: center;
  border-radius: 18px;
  background: var(--paper-100);
  color: var(--forest-600);
  font-size: 24px;
  font-weight: 800;
}

.article-body {
  color: var(--ink-900);
}

.article-body p {
  margin: 0 0 1.4rem;
  font-size: 17px;
  line-height: 1.9;
  color: var(--ink-600);
}

.article-body h1,
.article-body h2,
.article-body h3,
.article-body h4 {
  color: var(--forest-950);
  font-weight: 800;
  line-height: 1.4;
  margin-top: 2.6rem;
  margin-bottom: 0.9rem;
}

.article-body h2 {
  font-size: 1.5rem;
  position: relative;
  padding-left: 16px;
}

.article-body h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.28em;
  width: 4px;
  height: 1.05em;
  border-radius: 999px;
  background: var(--brand-gradient);
}

.article-body h3 {
  font-size: 1.25rem;
}

.article-body ul,
.article-body ol {
  margin: 0 0 1.4rem;
  padding-left: 1.2rem;
  color: var(--ink-600);
  line-height: 1.9;
}

.article-body ul li,
.article-body ol li {
  margin-bottom: 0.45rem;
}

.article-body ul li::marker {
  color: var(--ember-500);
}

.article-body blockquote {
  margin: 2rem 0;
  padding: 18px 20px;
  border-left: 4px solid var(--ember-500);
  background: var(--paper-100);
  border-radius: 16px;
  color: var(--ink-600);
  line-height: 1.9;
}

.article-body figcaption {
  color: var(--ink-400);
  font-size: 13px;
  text-align: center;
  line-height: 1.6;
  margin-top: 8px;
}

.article-body img {
  border-radius: 18px;
  margin: 1.6rem auto;
}

.article-body strong {
  color: var(--forest-800);
  font-weight: 700;
}

.article-body a {
  color: var(--ember-600);
  font-weight: 600;
  border-bottom: 1px solid rgba(240, 90, 42, 0.3);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.article-body a:hover {
  color: var(--ember-400);
  border-color: var(--ember-400);
}

.article-body table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 2rem 0;
  border: 1px solid var(--line-100);
  border-radius: 16px;
  overflow: hidden;
  background: #fff;
}

.article-body th {
  background: var(--forest-900);
  color: #fff;
  font-weight: 600;
  text-align: left;
  padding: 12px 14px;
  font-size: 14px;
}

.article-body td {
  padding: 12px 14px;
  border-top: 1px solid var(--line-100);
  color: var(--ink-600);
  font-size: 15px;
  line-height: 1.7;
}

.article-body tbody tr:hover {
  background: var(--paper-100);
}

.article-body code {
  background: var(--paper-100);
  border: 1px solid var(--line-100);
  border-radius: 8px;
  padding: 2px 7px;
  font-size: 0.9em;
  color: var(--ember-600);
}

.article-body pre {
  background: var(--forest-950);
  color: #fff;
  border-radius: 18px;
  padding: 20px;
  overflow-x: auto;
  line-height: 1.7;
}

.article-body hr {
  border: none;
  height: 1px;
  background: var(--line-100);
  margin: 2.4rem 0;
}

.footer-night {
  background: var(--night-gradient);
}

.footer-list a {
  position: relative;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-list a:hover {
  color: #fff;
  padding-left: 15px;
}

.footer-list a:hover::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 3px;
  height: 14px;
  border-radius: 999px;
  background: var(--ember-400);
}

@media (max-width: 640px) {
  .write-container {
    padding-left: 18px;
    padding-right: 18px;
  }

  .brand-name {
    max-width: 150px;
  }
}

/* roulang page: category2 */
:root {
            --forest-950: #071F1A;
            --forest-900: #0A2E27;
            --forest-800: #0F4035;
            --forest-700: #175944;
            --forest-600: #1F6F55;
            --ember-600: #DD4B25;
            --ember-500: #F05A2A;
            --ember-400: #FF7A3C;
            --sun-400: #FFB45C;
            --leaf-400: #2EC286;
            --paper-50: #FAF7F1;
            --paper-100: #F3EDE2;
            --sand-200: #E7DCCB;
            --ink-900: #16211D;
            --ink-600: #3D4A44;
            --ink-400: #6E7972;
            --line-100: #E5DED1;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
            background-color: var(--paper-50);
            color: var(--ink-900);
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }

        * {
            box-sizing: border-box;
        }

        img {
            max-width: 100%;
            height: auto;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        button {
            cursor: pointer;
        }

        .write-container {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        @media (min-width: 768px) {
            .write-container {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }

        ::selection {
            background: rgba(255, 180, 92, 0.3);
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(250, 247, 241, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--line-100);
        }

        .tab-link {
            position: relative;
            display: inline-block;
            padding: 0.5rem 1rem;
            font-size: 14px;
            font-weight: 600;
            color: var(--forest-900);
            border-radius: 999px;
            transition: background-color 0.25s ease, color 0.25s ease;
        }

        .tab-link:hover {
            background: rgba(240, 90, 42, 0.08);
            color: var(--ember-600);
        }

        .tab-link.active {
            background: rgba(240, 90, 42, 0.12);
            color: var(--ember-600);
        }

        .footer-list a {
            position: relative;
            transition: color 0.2s ease, padding-left 0.2s ease;
        }

        .footer-list a:hover {
            color: #fff;
            padding-left: 14px;
        }

        .footer-list a::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 0;
            height: 2px;
            background: var(--ember-500);
            border-radius: 2px;
            transition: width 0.2s ease;
        }

        .footer-list a:hover::before {
            width: 6px;
        }

        .pill-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 4px 14px;
            border-radius: 999px;
            background: #fff;
            border: 1px solid var(--line-100);
            font-size: 13px;
            font-weight: 600;
            color: var(--ink-600);
        }

        .pill-badge::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 999px;
            background: var(--ember-500);
            flex-shrink: 0;
        }

        .pill-badge-dark {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 4px 14px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.14);
            font-size: 13px;
            font-weight: 600;
            color: rgba(250, 247, 241, 0.88);
        }

        .pill-badge-dark::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 999px;
            background: var(--sun-400);
            flex-shrink: 0;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 0.875rem 2rem;
            border-radius: 999px;
            background: linear-gradient(135deg, #DD4B25, #FF7A3C);
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            border: none;
            box-shadow: 0 4px 14px rgba(221, 75, 37, 0.24);
            transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
            line-height: 1.4;
        }

        .btn-primary:hover {
            filter: brightness(1.04);
            transform: translateY(-1px) translateX(1px);
            box-shadow: 0 8px 24px rgba(221, 75, 37, 0.3);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 0.875rem 2rem;
            border-radius: 999px;
            background: #fff;
            border: 2px solid var(--forest-700);
            color: var(--forest-700);
            font-size: 16px;
            font-weight: 700;
            transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
        }

        .btn-secondary:hover {
            background: rgba(255, 180, 92, 0.2);
            color: var(--forest-800);
            transform: translateY(-1px);
        }

        .btn-secondary:active {
            transform: scale(0.98);
        }

        .faq-card {
            border-radius: 16px;
            background: #fff;
            border: 1px solid var(--line-100);
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .faq-card[open] {
            border-color: rgba(240, 90, 42, 0.4);
            box-shadow: var(--shadow-card);
        }

        .faq-card summary {
            cursor: pointer;
            padding: 1.25rem 1.5rem;
            font-weight: 600;
            color: var(--ink-900);
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .faq-card summary::-webkit-details-marker {
            display: none;
        }

        .faq-card summary::after {
            content: "+";
            font-size: 22px;
            font-weight: 400;
            color: var(--ember-500);
            transition: transform 0.2s ease;
            flex-shrink: 0;
        }

        .faq-card[open] summary::after {
            content: "×";
        }

        .faq-card .faq-answer {
            padding: 0 1.5rem 1.25rem;
            color: var(--ink-600);
            font-size: 15px;
        }

        .risk-item {
            border-left: 4px solid rgba(240, 90, 42, 0.65);
            border-radius: 0 12px 12px 0;
        }

        .risk-tag {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.02em;
        }

        .step-dot {
            display: grid;
            place-items: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(240, 90, 42, 0.1);
            color: var(--ember-600);
            font-weight: 800;
            font-size: 16px;
            flex-shrink: 0;
        }

        .cover-card {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .cover-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(20, 30, 25, 0.16);
        }

        .scrollbar-hide::-webkit-scrollbar {
            display: none;
        }

        .scrollbar-hide {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }

        @media (max-width: 767px) {
            .desktop-nav-links {
                display: none;
            }
            .mobile-nav-trigger {
                display: inline-flex;
            }
        }

        @media (min-width: 768px) {
            .desktop-nav-links {
                display: flex;
            }
            .mobile-nav-trigger {
                display: none;
            }
        }

        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 100;
            background: rgba(7, 31, 26, 0.42);
            backdrop-filter: blur(2px);
        }

        .mobile-drawer.open {
            display: block;
        }

        .mobile-drawer-panel {
            position: absolute;
            top: 0;
            right: 0;
            height: 100%;
            width: 280px;
            max-width: 88vw;
            background: var(--paper-50);
            box-shadow: -12px 0 36px rgba(7, 31, 26, 0.16);
            display: flex;
            flex-direction: column;
            padding: 24px 20px;
            gap: 4px;
            transform: translateX(100%);
            transition: transform 0.28s ease;
        }

        .mobile-drawer.open .mobile-drawer-panel {
            transform: translateX(0);
        }
        .info-tip {
            background: rgba(46, 194, 134, 0.08);
            border: 1px solid rgba(46, 194, 134, 0.22);
            border-radius: 14px;
            padding: 16px 20px;
        }

/* roulang page: category3 */
:root {
    --forest-950: #071F1A;
    --forest-900: #0A2E27;
    --forest-800: #0F4035;
    --forest-700: #175944;
    --forest-600: #1F6F55;
    --ember-600: #DD4B25;
    --ember-500: #F05A2A;
    --ember-400: #FF7A3C;
    --sun-400: #FFB45C;
    --leaf-400: #2EC286;
    --paper-50: #FAF7F1;
    --paper-100: #F3EDE2;
    --sand-200: #E7DCCB;
    --ink-900: #16211D;
    --ink-600: #3D4A44;
    --ink-400: #6E7972;
    --line-100: #E5DED1;
  }

  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
    background: var(--paper-50);
    color: var(--ink-900);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }

  img {
    display: block;
    max-width: 100%;
  }

  a {
    color: inherit;
    text-decoration: none;
    transition: color .2s ease, background .2s ease, box-shadow .2s ease, transform .2s ease;
  }

  a:hover {
    color: inherit;
  }

  button,
  input {
    font: inherit;
  }

  :focus-visible {
    outline: 2px solid var(--sun-400);
    outline-offset: 2px;
  }

  .write-container {
    width: 100%;
    max-width: 1200px;
    margin-inline: auto;
    padding-inline: 1.25rem;
  }

  @media (min-width: 768px) {
    .write-container {
      padding-inline: 1.5rem;
    }
  }

  .bg-brand-gradient {
    background-image: linear-gradient(135deg, var(--ember-600), var(--ember-400));
  }

  .bg-night-gradient {
    background-image: linear-gradient(180deg, var(--forest-950), var(--forest-800));
  }

  .brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.1rem;
    height: 2.1rem;
    border-radius: .85rem;
    background-image: linear-gradient(135deg, var(--ember-600), var(--ember-400));
    color: #fff;
    font-weight: 900;
    font-size: 1.1rem;
    box-shadow: 0 6px 18px rgba(221, 75, 37, 0.25);
    flex-shrink: 0;
  }

  .subject-link {
    position: relative;
    white-space: nowrap;
    border-radius: 999px;
    color: var(--forest-900);
    font-weight: 600;
    transition: all .2s ease;
  }

  .subject-link:hover {
    background: #FDE9DC;
    color: var(--ember-600);
  }

  .subject-link.active {
    background: #FEEDE2;
    color: var(--ember-600);
    box-shadow: inset 0 0 0 1px rgba(240, 90, 42, 0.22);
  }

  .nav-scroll {
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .nav-scroll::-webkit-scrollbar {
    display: none;
  }

  .trend-link {
    color: var(--ink-400);
    font-size: 13px;
    font-weight: 500;
    white-space: nowrap;
  }

  .trend-link:hover {
    color: var(--ember-600);
  }

  .channelbar {
    background: rgba(250, 247, 241, 0.92);
    backdrop-filter: blur(10px);
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .45rem;
    min-height: 44px;
    padding: .55rem 1.35rem;
    border-radius: 999px;
    font-weight: 700;
    line-height: 1.4;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all .2s ease;
    white-space: nowrap;
  }

  .btn-primary {
    background-image: linear-gradient(135deg, var(--ember-600), var(--ember-400));
    color: #fff;
    box-shadow: 0 10px 24px rgba(221, 75, 37, 0.24);
  }

  .btn-primary:hover {
    transform: translate(1px, -1px);
    filter: saturate(1.06) brightness(1.03);
  }

  .btn-primary:active {
    transform: scale(0.98);
  }

  .btn-secondary {
    background: #fff;
    color: var(--forest-800);
    border-color: var(--forest-700);
  }

  .btn-secondary:hover {
    background: #FFF2E8;
    border-color: var(--ember-500);
    color: var(--ember-600);
  }

  .btn-secondary:active {
    transform: scale(0.98);
  }

  .btn-soft {
    background: var(--paper-100);
    color: var(--forest-900);
  }

  .btn-soft:hover {
    background: #FDE9DC;
    color: var(--ember-600);
  }

  .btn-sm {
    min-height: 40px;
    padding: .4rem 1rem;
    font-size: 13px;
  }

  .btn svg {
    width: 1.05rem;
    height: 1.05rem;
  }

  .data-badge {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    min-height: 28px;
    padding: .2rem .7rem;
    border-radius: 999px;
    background: #fff;
    border: 1px solid var(--line-100);
    box-shadow: 0 1px 3px rgba(20, 30, 25, 0.04);
    font-size: 13px;
    font-weight: 600;
    color: var(--ink-600);
    white-space: nowrap;
  }

  .data-badge::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--ember-500);
    flex-shrink: 0;
  }

  .soft-card {
    background: #fff;
    border: 1px solid var(--line-100);
    border-radius: 1.25rem;
    box-shadow: 0 1px 3px rgba(20, 30, 25, 0.06), 0 12px 32px rgba(20, 30, 25, 0.08);
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  }

  .soft-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(20, 30, 25, 0.16);
  }

  .img-zoom {
    overflow: hidden;
  }

  .img-zoom img {
    transition: transform .5s ease;
  }

  .img-zoom:hover img {
    transform: scale(1.03);
  }

  .anchor-pill {
    display: inline-flex;
    align-items: center;
    min-height: 42px;
    padding: .4rem 1rem;
    border-radius: 999px;
    background: var(--paper-100);
    color: var(--forest-800);
    font-weight: 600;
    font-size: 14px;
    white-space: nowrap;
    transition: all .2s ease;
  }

  .anchor-pill:hover {
    background: #FDE9DC;
    color: var(--ember-600);
  }

  .version-tag {
    display: inline-flex;
    align-items: center;
    padding: .2rem .7rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.14);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .02em;
  }

  .timeline-list {
    position: relative;
    padding-left: 2rem;
  }

  .timeline-list::before {
    content: "";
    position: absolute;
    left: .4rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--sand-200);
  }

  .timeline-node {
    position: relative;
    margin-bottom: 3rem;
  }

  .timeline-node::before {
    content: "";
    position: absolute;
    left: -2rem;
    top: .35rem;
    width: 12px;
    height: 12px;
    border-radius: 999px;
    background: var(--ember-500);
    box-shadow: 0 0 0 4px #FCE8DC;
  }

  .timeline-date {
    font-size: 13px;
    color: var(--ember-600);
    font-weight: 700;
    letter-spacing: .02em;
  }

  .compare-panel {
    border: 1px solid var(--line-100);
    border-radius: 1.25rem;
    background: #fff;
    overflow: hidden;
  }

  .compare-row {
    display: grid;
    grid-template-columns: 1fr;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--line-100);
    transition: background .2s ease;
  }

  .compare-row:hover {
    background: #FFF8F2;
  }

  .compare-row:last-child {
    border-bottom: 0;
  }

  .compare-head {
    background: var(--forest-900);
    color: var(--paper-50);
    padding: 1rem 1.25rem;
    display: none;
    font-size: 14px;
    font-weight: 700;
  }

  .tag-old {
    display: inline-block;
    border-radius: 999px;
    background: var(--paper-100);
    color: var(--ink-400);
    padding: .15rem .6rem;
    font-size: 12px;
    font-weight: 600;
  }

  .tag-new {
    display: inline-block;
    border-radius: 999px;
    background: #E7F7EF;
    color: #148554;
    padding: .15rem .6rem;
    font-size: 12px;
    font-weight: 600;
  }

  .faq-card {
    border-radius: 1rem;
    border: 1px solid var(--line-100);
    background: #fff;
    box-shadow: 0 1px 3px rgba(20, 30, 25, 0.04);
    padding: 0 1.25rem;
    transition: border-color .2s ease, box-shadow .2s ease;
  }

  .faq-card[open] {
    border-color: rgba(240, 90, 42, 0.45);
    box-shadow: 0 8px 24px rgba(20, 30, 25, 0.10);
  }

  .faq-card summary {
    list-style: none;
    padding: 1.1rem 0;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    color: var(--forest-950);
  }

  .faq-card summary::-webkit-details-marker {
    display: none;
  }

  .faq-card summary::after {
    content: "+";
    font-size: 1.5rem;
    color: var(--ember-500);
    font-weight: 500;
    line-height: 1.2;
    flex-shrink: 0;
    transition: transform .2s ease;
  }

  .faq-card[open] summary::after {
    content: "−";
  }

  .faq-body {
    padding-bottom: 1.2rem;
    color: var(--ink-600);
    font-size: 15px;
    max-width: 720px;
  }

  .footer-night {
    background-image: linear-gradient(180deg, var(--forest-950), var(--forest-800));
  }

  .footer-list a {
    position: relative;
    padding-left: 0;
    color: rgba(250, 247, 241, 0.72);
    transition: all .2s ease;
  }

  .footer-list a:hover {
    color: #fff;
    padding-left: .8rem;
  }

  .footer-list a::before {
    content: "";
    position: absolute;
    left: -4px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 2px;
    border-radius: 999px;
    background: var(--ember-400);
    opacity: 0;
    transition: all .2s ease;
  }

  .footer-list a:hover::before {
    width: 6px;
    left: 0;
    opacity: 1;
  }

  .icon-search-box {
    width: 1.1rem;
    color: var(--forest-900);
  }

  .mobile-search {
    opacity: 0;
    visibility: hidden;
    max-height: 0;
    overflow: hidden;
    transition: all .3s ease;
  }

  .mobile-search.open {
    opacity: 1;
    visibility: visible;
    max-height: 140px;
    margin-bottom: .4rem;
  }

  @media (min-width: 768px) {
    .compare-row {
      grid-template-columns: 180px 1fr 1fr;
      align-items: center;
    }

    .compare-head {
      display: grid;
      grid-template-columns: 180px 1fr 1fr;
    }
  }

/* roulang page: category4 */
/* ========== 设计变量 ========== */
        :root {
            --forest-950: #071F1A;
            --forest-900: #0A2E27;
            --forest-800: #0F4035;
            --forest-700: #175944;
            --forest-600: #1F6F55;
            --ember-600: #DD4B25;
            --ember-500: #F05A2A;
            --ember-400: #FF7A3C;
            --sun-400: #FFB45C;
            --leaf-400: #2EC286;
            --paper-50: #FAF7F1;
            --paper-100: #F3EDE2;
            --sand-200: #E7DCCB;
            --ink-900: #16211D;
            --ink-600: #3D4A44;
            --ink-400: #6E7972;
            --line-100: #E5DED1;
            --card-shadow: 0 1px 3px rgba(20, 30, 25, 0.06), 0 12px 32px rgba(20, 30, 25, 0.08);
            --card-shadow-lg: 0 8px 24px rgba(20, 30, 25, 0.16);
            --radius-card: 1.25rem;
            --radius-md: 1rem;
        }

        /* ========== 基础 Reset ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--paper-50);
            color: var(--ink-900);
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
            font-size: 16px;
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }

        h1,
        h2,
        h3,
        p {
            margin: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        img {
            display: block;
            max-width: 100%;
        }

        button,
        input {
            font-family: inherit;
        }

        ::selection {
            background: rgba(255, 180, 92, 0.35);
        }

        :focus-visible {
            outline: 2px solid var(--sun-400);
            outline-offset: 2px;
            border-radius: 6px;
        }

        .write-container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        @media (min-width: 768px) {
            .write-container {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.95rem;
            line-height: 1.2;
            padding: 0.8rem 1.5rem;
            transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--ember-600), var(--ember-400));
            color: #fff;
            box-shadow: 0 8px 24px rgba(221, 75, 37, 0.28);
        }

        .btn-primary:hover {
            transform: translate(1px, -1px);
            box-shadow: 0 10px 28px rgba(221, 75, 37, 0.35);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-outline {
            background: #fff;
            color: var(--forest-800);
            border: 2px solid var(--forest-700);
            box-shadow: none;
        }

        .btn-outline:hover {
            background: #fdf0e7;
            color: var(--forest-900);
        }

        .btn-outline:active {
            transform: scale(0.98);
        }

        /* ========== 导航 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(250, 247, 241, 0.92);
            -webkit-backdrop-filter: blur(14px);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--line-100);
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--forest-950);
            font-weight: 800;
            font-size: 1rem;
        }

        .brand-mark {
            display: grid;
            width: 2rem;
            height: 2rem;
            place-items: center;
            border-radius: 0.75rem;
            background: linear-gradient(135deg, var(--ember-600), var(--ember-400));
            color: #fff;
            font-weight: 800;
            font-size: 0.95rem;
            box-shadow: 0 6px 16px rgba(221, 75, 37, 0.25);
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            border-radius: 999px;
            padding: 0.4rem 0.9rem;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--ink-600);
            border: 1px solid var(--line-100);
            background: #fff;
            transition: all 0.2s ease;
        }

        .header-cta:hover {
            border-color: var(--sun-400);
            color: var(--forest-900);
        }

        .nav-strip {
            border-top: 1px solid rgba(231, 220, 203, 0.5);
        }

        .subject-link {
            display: inline-block;
            flex-shrink: 0;
            border-radius: 999px;
            padding: 0.42rem 0.85rem;
            font-size: 0.86rem;
            font-weight: 600;
            color: var(--ink-600);
            transition: all 0.18s ease;
        }

        .subject-link:hover {
            background: var(--sand-200);
            color: var(--forest-950);
        }

        .subject-link.active {
            background: #fbeae3;
            color: var(--ember-700);
            box-shadow: inset 0 0 0 1px rgba(221, 75, 37, 0.12);
        }

        .hot-link {
            flex-shrink: 0;
            font-size: 0.78rem;
            color: var(--ink-400);
            display: inline-flex;
            align-items: center;
            gap: 0.2rem;
            transition: color 0.18s ease;
        }

        .hot-link::before {
            content: "";
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--ember-400);
        }

        .hot-link:hover {
            color: var(--forest-800);
        }

        .nav-scroll {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-scroll::-webkit-scrollbar {
            display: none;
        }

        /* ========== 面包屑 ========== */
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.45rem;
            font-size: 0.82rem;
            color: var(--ink-400);
            margin-bottom: 1rem;
        }

        .breadcrumb a {
            color: var(--forest-800);
            transition: color 0.18s;
        }

        .breadcrumb a:hover {
            color: var(--ember-500);
        }

        .breadcrumb span {
            color: var(--sand-200);
        }

        .breadcrumb .current {
            color: var(--ink-600);
        }

        /* ========== 分类页顶部 ========== */
        .category-hero {
            background: var(--paper-50);
            padding: 3.5rem 0 2.75rem;
            border-bottom: 1px solid var(--line-100);
        }

        .category-hero h1 {
            font-size: clamp(1.8rem, 3.4vw, 3rem);
            font-weight: 800;
            line-height: 1.22;
            letter-spacing: -0.02em;
            color: var(--forest-950);
        }

        .category-hero .hero-desc {
            color: var(--ink-600);
            font-size: 1rem;
            line-height: 1.9;
            margin-top: 1rem;
        }

        .tag-pill {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            padding: 0.32rem 0.75rem;
            border-radius: 999px;
            font-size: 0.78rem;
            font-weight: 500;
            color: var(--ink-600);
            background: #fff;
            border: 1px solid var(--line-100);
            box-shadow: 0 1px 2px rgba(20, 30, 25, 0.03);
        }

        .tag-pill::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--ember-400);
        }

        /* ========== 锚点胶囊 ========== */
        .quick-anchor {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            align-items: center;
        }

        .quick-anchor a {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            border-radius: 999px;
            padding: 0.45rem 1rem;
            background: #fff4eb;
            border: 1px solid rgba(240, 90, 42, 0.15);
            color: var(--ember-600);
            font-size: 0.84rem;
            font-weight: 600;
            transition: all 0.2s ease;
        }

        .quick-anchor a:hover {
            background: var(--ember-500);
            border-color: var(--ember-500);
            color: #fff;
        }

        /* ========== 诊断分类卡 ========== */
        .diag-card {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 1.6rem;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(231, 220, 203, 0.5);
            transition: transform 0.2s ease, box-shadow 0.25s ease;
            height: 100%;
        }

        .diag-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--card-shadow-lg);
        }

        .diag-icon {
            width: 2.75rem;
            height: 2.75rem;
            display: grid;
            place-items: center;
            border-radius: 0.9rem;
            background: rgba(240, 90, 42, 0.12);
            color: var(--ember-600);
            font-weight: 800;
            font-size: 1.1rem;
        }

        .diag-card h3 {
            font-size: 1.06rem;
            font-weight: 700;
            color: var(--forest-950);
            line-height: 1.4;
        }

        .diag-card p {
            color: var(--ink-600);
            font-size: 0.88rem;
            line-height: 1.8;
        }

        .diag-link {
            color: var(--forest-700);
            font-size: 0.84rem;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 0.2rem;
            transition: color 0.2s;
        }

        .diag-link:hover {
            color: var(--ember-500);
        }

        /* ========== 特色导读横卡 ========== */
        .feature-card {
            display: grid;
            grid-template-columns: 1fr;
            background: #fff;
            border-radius: calc(var(--radius-card) + 0.25rem);
            overflow: hidden;
            border: 1px solid rgba(231, 220, 203, 0.55);
            box-shadow: var(--card-shadow);
            transition: box-shadow 0.25s ease, transform 0.25s ease;
        }

        .feature-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--card-shadow-lg);
        }

        @media (min-width: 768px) {
            .feature-card {
                grid-template-columns: 1.05fr 1.4fr;
            }
        }

        .feature-thumb {
            position: relative;
            min-height: 220px;
        }

        .feature-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
        }

        .feature-thumb::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(7, 31, 26, 0.16));
        }

        .cat-tag {
            position: absolute;
            top: 1rem;
            left: 1rem;
            z-index: 2;
            border-radius: 999px;
            padding: 0.28rem 0.8rem;
            font-size: 0.76rem;
            font-weight: 600;
            color: var(--forest-900);
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(6px);
        }

        .duration-badge {
            position: absolute;
            right: 1rem;
            bottom: 1rem;
            z-index: 2;
            border-radius: 999px;
            background: rgba(7, 31, 26, 0.72);
            color: #fff;
            font-size: 0.72rem;
            padding: 0.2rem 0.6rem;
        }

        /* ========== FAQ ========== */
        .faq-wrap {
            max-width: 880px;
            margin: 0 auto;
        }

        .faq-group {
            border-radius: var(--radius-md);
            background: #fff;
            border: 1px solid var(--line-100);
            box-shadow: 0 1px 3px rgba(20, 30, 25, 0.04);
            overflow: hidden;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .faq-group+.faq-group {
            margin-top: 0.75rem;
        }

        .faq-group[open] {
            border-color: rgba(240, 90, 42, 0.4);
            box-shadow: 0 0 0 3px rgba(240, 90, 42, 0.06), var(--card-shadow);
        }

        .faq-group summary {
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.1rem 1.35rem;
            font-weight: 600;
            font-size: 1rem;
            color: var(--forest-950);
            line-height: 1.5;
            user-select: none;
        }

        .faq-group summary::-webkit-details-marker {
            display: none;
        }

        .faq-group summary::after {
            content: "+";
            flex-shrink: 0;
            width: 1.7rem;
            height: 1.7rem;
            display: grid;
            place-items: center;
            border-radius: 50%;
            background: var(--paper-100);
            color: var(--forest-800);
            font-size: 1.05rem;
            font-weight: 500;
            transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
        }

        .faq-group[open] summary::after {
            transform: rotate(135deg);
            background: var(--ember-500);
            color: #fff;
        }

        .faq-group .faq-body {
            padding: 0 1.35rem 1.25rem;
            color: var(--ink-600);
            font-size: 0.9rem;
            line-height: 1.9;
        }

        .faq-group .faq-body p+p {
            margin-top: 0.6rem;
        }

        .faq-note {
            display: inline-block;
            margin-top: 0.7rem;
            padding: 0.35rem 0.9rem;
            border-radius: 999px;
            background: var(--paper-100);
            color: var(--ink-600);
            font-size: 0.78rem;
        }

        /* ========== 自检清单 ========== */
        .check-panel {
            border-radius: calc(var(--radius-card) + 0.25rem);
            background: linear-gradient(150deg, rgba(7, 31, 26, 0.98), rgba(15, 64, 53, 0.96));
            padding: 2rem;
        }

        @media (min-width: 768px) {
            .check-panel {
                padding: 2.75rem;
            }
        }

        .check-item {
            display: flex;
            gap: 1rem;
            padding: 1.15rem 0.25rem;
            align-items: flex-start;
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        }

        .check-item:last-child {
            border-bottom: 0;
        }

        .check-item:hover {
            background: rgba(240, 90, 42, 0.06);
        }

        .check-num {
            flex-shrink: 0;
            width: 2rem;
            height: 2rem;
            border-radius: 50%;
            background: rgba(46, 194, 134, 0.18);
            color: #8AEFC0;
            font-weight: 700;
            display: grid;
            place-items: center;
            font-size: 0.85rem;
        }

        .check-body h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
        }

        .check-body p {
            color: rgba(250, 247, 241, 0.72);
            font-size: 0.86rem;
            line-height: 1.75;
            margin-top: 0.2rem;
        }

        /* ========== 处理顺序条 ========== */
        .step-line {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .step-item {
            display: flex;
            gap: 0.9rem;
            align-items: flex-start;
            border-radius: 1rem;
            background: #fff;
            padding: 1rem 1.2rem;
            border: 1px solid var(--line-100);
            box-shadow: 0 1px 3px rgba(20, 30, 25, 0.04);
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .step-item:hover {
            border-color: rgba(240, 90, 42, 0.35);
            box-shadow: var(--card-shadow);
        }

        .step-dot {
            width: 2.2rem;
            height: 2.2rem;
            flex-shrink: 0;
            border-radius: 50%;
            display: grid;
            place-items: center;
            background: rgba(240, 90, 42, 0.12);
            color: var(--ember-600);
            font-weight: 800;
            font-size: 0.8rem;
        }

        .step-item strong {
            display: block;
            font-size: 0.95rem;
            color: var(--forest-950);
            line-height: 1.4;
        }

        .step-item span {
            color: var(--ink-600);
            font-size: 0.84rem;
            line-height: 1.7;
            display: block;
            margin-top: 0.2rem;
        }

        /* ========== CTA ========== */
        .cta-band {
            position: relative;
            background: linear-gradient(150deg, var(--forest-950), var(--forest-800));
            border-radius: calc(var(--radius-card) + 0.3rem);
            padding: 3rem 1.5rem;
            overflow: hidden;
        }

        @media (min-width: 768px) {
            .cta-band {
                padding: 3.5rem 3.5rem;
            }
        }

        .cta-band::after {
            content: "";
            position: absolute;
            right: -10%;
            top: -60%;
            width: 340px;
            height: 340px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(240, 90, 42, 0.26), transparent 68%);
            pointer-events: none;
        }

        .stat-mini {
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.14);
            color: rgba(250, 247, 241, 0.88);
            font-size: 0.78rem;
            padding: 0.35rem 0.8rem;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            font-weight: 500;
        }

        .stat-mini::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--leaf-400);
        }

        /* ========== 页脚 ========== */
        .footer-night {
            background: linear-gradient(180deg, var(--forest-950), var(--forest-900));
            color: rgba(250, 247, 241, 0.9);
        }

        .footer-list a {
            position: relative;
            color: rgba(250, 247, 241, 0.66);
            transition: padding-left 0.2s ease, color 0.2s ease;
        }

        .footer-list a:hover {
            color: #fff;
            padding-left: 0.65rem;
        }

        .footer-list a::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            width: 0;
            height: 2px;
            background: var(--ember-400);
            transition: width 0.18s ease;
            transform: translateY(-50%);
        }

        .footer-list a:hover::before {
            width: 0.4rem;
        }

        /* ========== 区块间距 ========== */
        .section-space {
            padding-top: 4rem;
            padding-bottom: 4rem;
        }

        @media (min-width: 768px) {
            .section-space {
                padding-top: 5.5rem;
                padding-bottom: 5.5rem;
            }
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            color: var(--ember-600);
            text-transform: uppercase;
            margin-bottom: 0.6rem;
        }

        .eyebrow::before {
            content: "";
            width: 16px;
            height: 2px;
            background: var(--ember-400);
            border-radius: 9px;
        }

        /* ========== 背景层次 ========== */
        .soft-bg {
            background: var(--paper-100);
        }

        /* ========== 移动端收尾 ========== */
        @media (max-width: 767px) {
            .header-cta span.cta-text {
                display: none;
            }

            .category-hero {
                padding-top: 2.5rem;
                padding-bottom: 2rem;
            }
        }

        @media (min-width: 992px) {
            .hot-words {
                display: flex !important;
            }
        }

        @media (pointer: coarse) {
            .btn,
            .subject-link,
            .faq-group summary,
            .hot-link {
                min-height: 44px;
            }

            .subject-link,
            .hot-link {
                display: inline-flex;
                align-items: center;
            }
        }