/* roulang page: index */
:root {
      --ink: #11131a;
      --ink-2: #14151c;
      --panel: #1e212b;
      --panel-2: #252936;
      --paper: #f5f3ee;
      --paper-2: #ebe7dc;
      --line: rgba(49, 53, 67, .92);
      --line-soft: rgba(255, 255, 255, .12);
      --text: #d8dce6;
      --text-dark: #222632;
      --muted: #8f96a8;
      --muted-dark: #666d7d;
      --amber: #ffb84d;
      --amber-2: #f29b21;
      --mint: #32d6b0;
      --mint-2: #20b996;
      --danger: #ff6b6b;
      --ok: #4ee48b;
      --radius-xl: 26px;
      --radius-lg: 20px;
      --radius-md: 15px;
      --radius-sm: 11px;
      --shadow-dark: 0 24px 60px rgba(0, 0, 0, .34);
      --shadow-soft: 0 18px 45px rgba(17, 19, 26, .12);
      --shadow-card: 0 10px 24px rgba(17, 19, 26, .09);
      --container: 1220px;
      --nav-h: 74px;
      --ease: 180ms ease;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 96px;
    }

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
      color: var(--text-dark);
      background:
        radial-gradient(circle at 12% 0%, rgba(255, 184, 77, .14), transparent 32%),
        radial-gradient(circle at 88% 12%, rgba(50, 214, 176, .16), transparent 30%),
        linear-gradient(180deg, #14151c 0, #14151c 520px, var(--paper) 520px, var(--paper) 100%);
      line-height: 1.8;
      overflow-x: hidden;
      padding-bottom: 0;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color var(--ease), border-color var(--ease), background var(--ease), transform var(--ease), box-shadow var(--ease);
    }

    a:hover {
      color: var(--mint);
    }

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

    button, input, textarea, select {
      font: inherit;
    }

    input, textarea, select {
      outline: none;
    }

    ::selection {
      background: rgba(50, 214, 176, .28);
      color: #fff;
    }

    .site-container {
      width: min(100% - 32px, var(--container));
      margin-inline: auto;
    }

    .navbar-shell {
      position: sticky;
      top: 0;
      z-index: 1040;
      min-height: var(--nav-h);
      background: rgba(17, 19, 26, .86);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid var(--line-soft);
      box-shadow: 0 10px 30px rgba(0, 0, 0, .18);
    }

    .navbar-shell .navbar {
      min-height: var(--nav-h);
      padding: 0;
    }

    .brand-mark {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      color: #fff;
      font-weight: 900;
      letter-spacing: -.02em;
      font-size: 18px;
      white-space: nowrap;
    }

    .brand-icon {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      position: relative;
      display: grid;
      place-items: center;
      color: var(--ink);
      background: linear-gradient(135deg, var(--amber), var(--mint));
      box-shadow: 0 12px 28px rgba(50, 214, 176, .18);
      overflow: hidden;
    }

    .brand-icon::before,
    .brand-icon::after {
      content: "";
      position: absolute;
      width: 4px;
      height: 4px;
      border-radius: 50%;
      background: rgba(17, 19, 26, .55);
      left: 7px;
      box-shadow: 0 9px 0 rgba(17, 19, 26, .55), 0 18px 0 rgba(17, 19, 26, .55), 22px 0 0 rgba(17, 19, 26, .55), 22px 9px 0 rgba(17, 19, 26, .55), 22px 18px 0 rgba(17, 19, 26, .55);
    }

    .brand-icon i {
      position: relative;
      z-index: 1;
      font-size: 19px;
    }

    .navbar-toggler {
      border: 1px solid var(--line-soft);
      border-radius: 14px;
      padding: 9px 11px;
      color: var(--text);
      box-shadow: none !important;
      background: rgba(255, 255, 255, .06);
    }

    .navbar-toggler:focus {
      outline: 3px solid rgba(50, 214, 176, .28);
    }

    .navbar-nav {
      gap: 8px;
      align-items: center;
    }

    .nav-link {
      color: var(--text) !important;
      font-weight: 700;
      font-size: 15px;
      padding: 10px 16px !important;
      border-radius: 999px;
      border: 1px solid transparent;
    }

    .nav-link:hover,
    .nav-link:focus,
    .nav-link.active {
      color: var(--ink) !important;
      background: var(--mint);
      border-color: rgba(255, 255, 255, .12);
      outline: none;
    }

    .mobile-tabs {
      display: none;
      position: fixed;
      left: 12px;
      right: 12px;
      bottom: 12px;
      bottom: calc(12px + env(safe-area-inset-bottom));
      z-index: 1050;
      background: rgba(17, 19, 26, .92);
      border: 1px solid var(--line-soft);
      border-radius: 22px;
      box-shadow: 0 20px 55px rgba(0, 0, 0, .32);
      backdrop-filter: blur(16px);
      padding: 8px;
    }

    .mobile-tabs a {
      flex: 1;
      min-height: 52px;
      border-radius: 16px;
      display: inline-flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 2px;
      color: var(--muted);
      font-size: 12px;
      font-weight: 800;
    }

    .mobile-tabs a i {
      font-size: 19px;
      line-height: 1;
    }

    .mobile-tabs a.active,
    .mobile-tabs a:hover,
    .mobile-tabs a:focus {
      color: var(--ink);
      background: linear-gradient(135deg, var(--mint), var(--amber));
      outline: none;
    }

    .btn-site {
      --btn-bg: var(--amber);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      min-height: 48px;
      padding: 12px 20px;
      border-radius: 15px;
      border: 1px solid rgba(17, 19, 26, .12);
      background: var(--btn-bg);
      color: var(--ink);
      font-weight: 900;
      letter-spacing: .01em;
      box-shadow: 0 14px 34px rgba(255, 184, 77, .22);
      cursor: pointer;
      transition: transform var(--ease), box-shadow var(--ease), background var(--ease), border-color var(--ease), color var(--ease);
    }

    .btn-site:hover {
      color: var(--ink);
      background: var(--amber-2);
      transform: translateY(-2px);
      box-shadow: 0 18px 42px rgba(255, 184, 77, .28);
    }

    .btn-site:focus-visible {
      outline: 3px solid rgba(50, 214, 176, .35);
      outline-offset: 3px;
    }

    .btn-site:active {
      transform: translateY(0);
    }

    .btn-site.btn-mint {
      --btn-bg: var(--mint);
      box-shadow: 0 14px 34px rgba(50, 214, 176, .18);
    }

    .btn-site.btn-mint:hover {
      background: var(--mint-2);
      box-shadow: 0 18px 42px rgba(50, 214, 176, .25);
    }

    .btn-site.btn-ghost {
      background: rgba(255, 255, 255, .06);
      color: var(--text);
      border-color: var(--line-soft);
      box-shadow: none;
    }

    .btn-site.btn-ghost:hover {
      background: rgba(50, 214, 176, .12);
      color: #fff;
      border-color: rgba(50, 214, 176, .45);
    }

    .btn-site:disabled,
    .btn-site.is-loading {
      opacity: .68;
      cursor: not-allowed;
      transform: none;
      box-shadow: none;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border-radius: 999px;
      background: rgba(50, 214, 176, .12);
      color: var(--mint);
      border: 1px solid rgba(50, 214, 176, .26);
      font-size: 13px;
      font-weight: 900;
      line-height: 1.2;
    }

    .badge-soft {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      min-height: 28px;
      padding: 5px 10px;
      border-radius: 999px;
      border: 1px solid rgba(49, 53, 67, .12);
      background: rgba(17, 19, 26, .05);
      color: var(--muted-dark);
      font-size: 12px;
      font-weight: 800;
      line-height: 1.2;
    }

    .badge-dark {
      border-color: var(--line-soft);
      background: rgba(255, 255, 255, .08);
      color: var(--text);
    }

    .section {
      padding: 86px 0;
      position: relative;
    }

    .section-tight {
      padding: 62px 0;
    }

    .section-head {
      max-width: 780px;
      margin-bottom: 34px;
    }

    .section-head.center {
      margin-inline: auto;
      text-align: center;
    }

    .section-kicker {
      color: var(--amber-2);
      font-weight: 900;
      font-size: 13px;
      letter-spacing: .08em;
      margin-bottom: 10px;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .section-title {
      font-size: clamp(28px, 4vw, 38px);
      line-height: 1.25;
      letter-spacing: -.04em;
      font-weight: 950;
      margin: 0 0 14px;
      color: var(--text-dark);
    }

    .section-desc {
      font-size: 16.5px;
      line-height: 1.85;
      color: var(--muted-dark);
      margin: 0;
      max-width: 720px;
    }

    .dark-section {
      background:
        linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px),
        radial-gradient(circle at 18% 12%, rgba(50, 214, 176, .16), transparent 28%),
        linear-gradient(180deg, var(--ink), #171922);
      background-size: 26px 26px, 26px 26px, auto, auto;
      color: var(--text);
      border-top: 1px solid var(--line-soft);
      border-bottom: 1px solid var(--line-soft);
    }

    .dark-section .section-title,
    .dark-section .section-desc {
      color: #fff;
    }

    .dark-section .section-desc {
      color: var(--muted);
    }

    .hero {
      padding: 56px 0 72px;
      color: #fff;
      position: relative;
      overflow: hidden;
    }

    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background:
        linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
      background-size: 30px 30px;
      mask-image: linear-gradient(180deg, #000 0, rgba(0, 0, 0, .8) 55%, transparent 100%);
      pointer-events: none;
    }

    .hero-stage {
      position: relative;
      min-height: 520px;
      border: 1px solid var(--line-soft);
      border-radius: 34px;
      background:
        radial-gradient(circle at 14% 20%, rgba(255, 184, 77, .24), transparent 26%),
        radial-gradient(circle at 82% 18%, rgba(50, 214, 176, .22), transparent 28%),
        linear-gradient(135deg, rgba(255, 255, 255, .08), rgba(255, 255, 255, .025));
      box-shadow: var(--shadow-dark);
      overflow: hidden;
      padding: clamp(28px, 5vw, 56px);
    }

    .hero-stage::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      height: 82px;
      background: repeating-linear-gradient(90deg, rgba(255,255,255,.18) 0 10px, transparent 10px 26px);
      opacity: .08;
      pointer-events: none;
    }

    .hero-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
      gap: 34px;
      align-items: stretch;
    }

    .hero-copy {
      display: flex;
      flex-direction: column;
      justify-content: center;
      max-width: 680px;
    }

    .hero h1 {
      font-size: clamp(38px, 5.4vw, 64px);
      line-height: 1.12;
      letter-spacing: -.055em;
      font-weight: 950;
      margin: 18px 0 18px;
    }

    .hero-lead {
      font-size: clamp(16px, 2vw, 19px);
      line-height: 1.9;
      color: rgba(216, 220, 230, .92);
      max-width: 650px;
      margin: 0 0 22px;
    }

    .hero-points {
      display: grid;
      gap: 10px;
      margin: 0 0 28px;
      padding: 0;
      list-style: none;
    }

    .hero-points li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      color: rgba(216, 220, 230, .94);
      font-weight: 700;
    }

    .hero-points i {
      color: var(--mint);
      margin-top: 4px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 22px;
    }

    .trust-strip {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      padding-top: 10px;
    }

    .dashboard-board {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 14px;
      align-content: center;
    }

    .metric-card {
      min-height: 154px;
      padding: 18px;
      border-radius: 22px;
      border: 1px solid var(--line-soft);
      background: rgba(17, 19, 26, .52);
      box-shadow: inset 0 1px 0 rgba(255,255,255,.08);
      transition: transform var(--ease), border-color var(--ease), background var(--ease);
    }

    .metric-card:hover {
      transform: translateY(-3px);
      border-color: rgba(50, 214, 176, .5);
      background: rgba(30, 33, 43, .86);
    }

    .metric-top {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      margin-bottom: 18px;
    }

    .metric-icon {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      background: rgba(50, 214, 176, .12);
      color: var(--mint);
      border: 1px solid rgba(50, 214, 176, .24);
      font-size: 19px;
    }

    .metric-value {
      font-size: 26px;
      line-height: 1.1;
      font-weight: 950;
      letter-spacing: -.03em;
      color: #fff;
      margin-bottom: 5px;
    }

    .metric-label {
      color: var(--muted);
      font-size: 13px;
      font-weight: 700;
      line-height: 1.55;
      margin: 0;
    }

    .quick-index {
      position: relative;
      z-index: 1;
      margin-top: 26px;
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .quick-index a {
      color: rgba(255,255,255,.86);
      border: 1px solid var(--line-soft);
      background: rgba(255,255,255,.05);
      border-radius: 999px;
      padding: 9px 13px;
      font-size: 13px;
      font-weight: 800;
    }

    .quick-index a:hover,
    .quick-index a:focus {
      color: var(--ink);
      background: var(--mint);
      border-color: var(--mint);
      outline: none;
    }

    .coupon-grid {
      display: grid;
      grid-template-columns: 1.15fr .85fr .85fr;
      gap: 18px;
      align-items: stretch;
    }

    .ticket-card {
      position: relative;
      min-height: 210px;
      padding: 24px;
      border-radius: var(--radius-xl);
      border: 1px solid rgba(49, 53, 67, .12);
      background: #fffdf8;
      box-shadow: var(--shadow-card);
      overflow: hidden;
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
    }

    .ticket-card::before,
    .ticket-card::after {
      content: "";
      position: absolute;
      top: 50%;
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: var(--paper);
      border: 1px solid rgba(49, 53, 67, .08);
      transform: translateY(-50%);
    }

    .ticket-card::before { left: -13px; }
    .ticket-card::after { right: -13px; }

    .ticket-card.large {
      grid-row: span 2;
      min-height: 438px;
      color: #fff;
      background:
        linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px),
        linear-gradient(145deg, #1b1d27, #101219);
      background-size: 24px 24px, 24px 24px, auto;
      border-color: var(--line-soft);
    }

    .ticket-card:hover {
      transform: translateY(-4px);
      border-color: rgba(50, 214, 176, .42);
      box-shadow: 0 18px 44px rgba(17, 19, 26, .16);
    }

    .ticket-no {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      display: inline-grid;
      place-items: center;
      margin-bottom: 18px;
      background: rgba(255, 184, 77, .14);
      color: var(--amber-2);
      font-weight: 950;
      border: 1px solid rgba(255, 184, 77, .26);
    }

    .ticket-card.large .ticket-no {
      background: rgba(255, 184, 77, .18);
      color: var(--amber);
      border-color: rgba(255, 184, 77, .28);
    }

    .ticket-card h3 {
      font-size: 22px;
      font-weight: 950;
      letter-spacing: -.03em;
      margin: 0 0 10px;
    }

    .ticket-card p {
      color: var(--muted-dark);
      margin: 0 0 18px;
      line-height: 1.75;
    }

    .ticket-card.large p {
      color: rgba(216, 220, 230, .82);
    }

    .ticket-link {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      color: var(--text-dark);
      font-weight: 900;
      border-bottom: 1px solid rgba(50, 214, 176, .45);
    }

    .ticket-card.large .ticket-link {
      color: #fff;
    }

    .screen-list {
      margin-top: 26px;
      border-radius: 22px;
      border: 1px solid var(--line-soft);
      background: rgba(255,255,255,.045);
      padding: 14px;
    }

    .screen-row {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 10px;
      border-bottom: 1px solid var(--line-soft);
    }

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

    .screen-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--mint);
      box-shadow: 0 0 0 5px rgba(50, 214, 176, .12);
      flex: 0 0 auto;
    }

    .screen-row span {
      color: rgba(216, 220, 230, .88);
      font-size: 14px;
      font-weight: 700;
    }

    .rules-wrap {
      display: grid;
      grid-template-columns: .82fr 1.18fr;
      gap: 22px;
      align-items: stretch;
    }

    .rule-panel,
    .guide-panel,
    .opinion-card,
    .security-card,
    .member-card,
    .compare-card,
    .news-card,
    .feedback-card,
    .contact-panel {
      border-radius: var(--radius-xl);
      border: 1px solid rgba(49, 53, 67, .12);
      background: rgba(255, 255, 255, .72);
      box-shadow: var(--shadow-card);
    }

    .rule-panel {
      padding: 26px;
      background:
        linear-gradient(135deg, rgba(255,184,77,.16), rgba(50,214,176,.08)),
        #fffdf8;
    }

    .rule-panel h3,
    .guide-panel h3,
    .opinion-card h3,
    .security-card h3,
    .member-card h3,
    .compare-card h3,
    .contact-panel h3 {
      font-size: 22px;
      line-height: 1.35;
      font-weight: 950;
      letter-spacing: -.03em;
      margin: 0 0 12px;
    }

    .rule-panel p,
    .guide-panel p,
    .opinion-card p,
    .security-card p,
    .member-card p,
    .compare-card p,
    .contact-panel p {
      color: var(--muted-dark);
      margin: 0;
    }

    .guide-panel {
      padding: 10px;
      overflow: hidden;
    }

    .step-list {
      display: grid;
      gap: 10px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .step-list li {
      display: grid;
      grid-template-columns: 54px 1fr;
      gap: 14px;
      align-items: start;
      padding: 18px;
      border-radius: 18px;
      background: #fffdf8;
      border: 1px solid rgba(49, 53, 67, .09);
    }

    .step-num {
      width: 46px;
      height: 46px;
      border-radius: 16px;
      display: grid;
      place-items: center;
      background: var(--ink);
      color: var(--amber);
      font-weight: 950;
      box-shadow: inset 0 0 0 1px var(--line-soft);
    }

    .step-list strong {
      display: block;
      color: var(--text-dark);
      font-size: 17px;
      margin-bottom: 4px;
    }

    .step-list span {
      display: block;
      color: var(--muted-dark);
      font-size: 14px;
      line-height: 1.65;
    }

    .opinion-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 18px;
    }

    .opinion-card {
      padding: 24px;
      position: relative;
      overflow: hidden;
      background: #fffdf8;
      transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
    }

    .opinion-card::before {
      content: "“";
      position: absolute;
      right: 22px;
      top: -12px;
      color: rgba(255, 184, 77, .22);
      font-size: 96px;
      font-weight: 950;
      line-height: 1;
    }

    .opinion-card:hover {
      transform: translateY(-4px);
      border-color: rgba(255, 184, 77, .45);
      box-shadow: var(--shadow-soft);
    }

    .security-grid {
      display: grid;
      grid-template-columns: 1.1fr .9fr .9fr;
      gap: 18px;
    }

    .security-card {
      padding: 24px;
      background: rgba(30, 33, 43, .72);
      color: var(--text);
      border-color: var(--line-soft);
      box-shadow: none;
      transition: transform var(--ease), border-color var(--ease), background var(--ease);
    }

    .security-card:hover {
      transform: translateY(-3px);
      border-color: rgba(50, 214, 176, .42);
      background: rgba(37, 41, 54, .92);
    }

    .security-card p {
      color: var(--muted);
    }

    .security-icon {
      width: 48px;
      height: 48px;
      display: grid;
      place-items: center;
      border-radius: 18px;
      background: rgba(50, 214, 176, .12);
      color: var(--mint);
      border: 1px solid rgba(50, 214, 176, .24);
      margin-bottom: 18px;
      font-size: 22px;
    }

    .member-grid {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 18px;
    }

    .member-card {
      padding: 24px;
      background: #fffdf8;
      transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
    }

    .member-card:hover {
      transform: translateY(-4px);
      border-color: rgba(50, 214, 176, .42);
      box-shadow: var(--shadow-soft);
    }

    .member-card i {
      color: var(--amber-2);
      font-size: 26px;
      margin-bottom: 14px;
      display: inline-block;
    }

    .compare-wrap {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 18px;
    }

    .compare-card {
      padding: 24px;
      background: #fffdf8;
      overflow: hidden;
      transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
    }

    .compare-card:hover {
      transform: translateY(-4px);
      border-color: rgba(50, 214, 176, .42);
      box-shadow: var(--shadow-soft);
    }

    .compare-card ul {
      list-style: none;
      margin: 18px 0 0;
      padding: 0;
      display: grid;
      gap: 12px;
    }

    .compare-card li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      color: var(--muted-dark);
      font-size: 14.5px;
      line-height: 1.65;
    }

    .compare-card li i {
      color: var(--mint-2);
      margin-top: 4px;
      flex: 0 0 auto;
    }

    .news-layout {
      display: grid;
      grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
      gap: 22px;
      align-items: start;
    }

    .news-feature {
      padding: 28px;
      min-height: 100%;
      border-radius: var(--radius-xl);
      background:
        radial-gradient(circle at 18% 12%, rgba(255,184,77,.18), transparent 28%),
        linear-gradient(145deg, #1b1d27, #101219);
      color: #fff;
      border: 1px solid var(--line-soft);
      box-shadow: var(--shadow-dark);
    }

    .news-feature h3 {
      font-size: 26px;
      line-height: 1.32;
      font-weight: 950;
      letter-spacing: -.04em;
      margin: 18px 0 12px;
    }

    .news-feature p {
      color: rgba(216,220,230,.82);
      margin: 0 0 22px;
      max-width: 520px;
    }

    .news-list {
      display: grid;
      gap: 12px;
    }

    .news-card {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 14px;
      padding: 18px;
      background: #fffdf8;
      transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
    }

    .news-card:hover {
      transform: translateY(-3px);
      border-color: rgba(50, 214, 176, .42);
      box-shadow: var(--shadow-soft);
    }

    .news-card h3 {
      margin: 8px 0 7px;
      font-size: 18px;
      line-height: 1.45;
      font-weight: 950;
      letter-spacing: -.02em;
    }

    .news-card p {
      margin: 0;
      color: var(--muted-dark);
      font-size: 14px;
      line-height: 1.65;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .news-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      align-items: center;
      color: var(--muted-dark);
      font-size: 12px;
      font-weight: 800;
    }

    .news-arrow {
      width: 40px;
      height: 40px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      background: rgba(17, 19, 26, .05);
      color: var(--text-dark);
      align-self: center;
      transition: background var(--ease), color var(--ease), transform var(--ease);
    }

    .news-card:hover .news-arrow {
      background: var(--mint);
      color: var(--ink);
      transform: translateX(2px);
    }

    .empty-state {
      border-radius: var(--radius-xl);
      border: 1px dashed rgba(49, 53, 67, .22);
      background: #fffdf8;
      padding: 34px;
      text-align: center;
      color: var(--muted-dark);
      box-shadow: var(--shadow-card);
    }

    .empty-state i {
      width: 58px;
      height: 58px;
      display: grid;
      place-items: center;
      margin: 0 auto 14px;
      border-radius: 20px;
      background: rgba(50, 214, 176, .12);
      color: var(--mint-2);
      font-size: 26px;
    }

    .empty-state strong {
      display: block;
      color: var(--text-dark);
      font-size: 18px;
      margin-bottom: 6px;
    }

    .faq-layout {
      display: grid;
      grid-template-columns: .8fr 1.2fr;
      gap: 22px;
      align-items: start;
    }

    .faq-tip {
      position: sticky;
      top: 96px;
      padding: 26px;
      border-radius: var(--radius-xl);
      color: var(--text);
      background: linear-gradient(145deg, #1b1d27, #101219);
      border: 1px solid var(--line-soft);
      box-shadow: var(--shadow-dark);
    }

    .faq-tip h3 {
      color: #fff;
      font-weight: 950;
      font-size: 22px;
      margin: 0 0 12px;
    }

    .faq-tip p {
      color: var(--muted);
      margin: 0 0 18px;
    }

    .accordion {
      display: grid;
      gap: 12px;
    }

    .accordion-item {
      border: 1px solid rgba(49, 53, 67, .12) !important;
      border-radius: 20px !important;
      overflow: hidden;
      background: #fffdf8;
      box-shadow: var(--shadow-card);
    }

    .accordion-button {
      gap: 12px;
      padding: 20px 22px;
      background: #fffdf8 !important;
      color: var(--text-dark) !important;
      font-weight: 950;
      line-height: 1.45;
      box-shadow: none !important;
    }

    .accordion-button::after {
      filter: grayscale(1);
      opacity: .6;
    }

    .accordion-button:not(.collapsed) {
      border-bottom: 1px solid rgba(49, 53, 67, .1);
    }

    .accordion-button:focus {
      outline: 3px solid rgba(50, 214, 176, .28);
      outline-offset: -3px;
      box-shadow: none;
    }

    .faq-no {
      width: 34px;
      height: 34px;
      border-radius: 12px;
      flex: 0 0 auto;
      display: inline-grid;
      place-items: center;
      background: rgba(255, 184, 77, .16);
      color: var(--amber-2);
      font-weight: 950;
      font-size: 13px;
    }

    .accordion-body {
      color: var(--muted-dark);
      line-height: 1.85;
      padding: 18px 22px 22px 68px;
      background: #fffdf8;
    }

    .use-cta {
      position: relative;
      overflow: hidden;
      border-radius: 34px;
      padding: clamp(28px, 5vw, 50px);
      color: #fff;
      background:
        radial-gradient(circle at 14% 10%, rgba(255,184,77,.24), transparent 30%),
        radial-gradient(circle at 86% 40%, rgba(50,214,176,.22), transparent 32%),
        linear-gradient(135deg, #1b1d27, #101219);
      border: 1px solid var(--line-soft);
      box-shadow: var(--shadow-dark);
    }

    .use-cta::after {
      content: "";
      position: absolute;
      inset: auto -20% -42% auto;
      width: 440px;
      height: 440px;
      border-radius: 50%;
      border: 1px solid rgba(255,255,255,.12);
      box-shadow: inset 0 0 0 24px rgba(255,255,255,.025);
      pointer-events: none;
    }

    .use-cta-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 24px;
      align-items: center;
    }

    .use-cta h2 {
      font-size: clamp(28px, 4vw, 42px);
      line-height: 1.22;
      font-weight: 950;
      letter-spacing: -.04em;
      margin: 0 0 12px;
    }

    .use-cta p {
      color: rgba(216,220,230,.84);
      max-width: 720px;
      margin: 0;
    }

    .feedback-layout {
      display: grid;
      grid-template-columns: 1.08fr .92fr;
      gap: 22px;
      align-items: stretch;
    }

    .feedback-card {
      padding: 28px;
      background: #fffdf8;
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 14px;
    }

    .form-field.full {
      grid-column: 1 / -1;
    }

    .form-label {
      color: var(--text-dark);
      font-weight: 900;
      font-size: 14px;
      margin-bottom: 7px;
    }

    .form-control,
    .form-select {
      min-height: 50px;
      border-radius: 15px;
      border: 1px solid rgba(49, 53, 67, .16);
      background-color: #fff;
      color: var(--text-dark);
      padding: 12px 14px;
      box-shadow: none !important;
    }

    textarea.form-control {
      min-height: 132px;
      resize: vertical;
    }

    .form-control:focus,
    .form-select:focus {
      border-color: var(--mint);
      outline: 0;
      box-shadow: 0 0 0 4px rgba(50, 214, 176, .16) !important;
    }

    .form-control::placeholder {
      color: #9ca2af;
    }

    .form-note {
      margin: 14px 0 0;
      color: var(--muted-dark);
      font-size: 13px;
      line-height: 1.65;
    }

    .contact-panel {
      padding: 28px;
      color: var(--text);
      background: linear-gradient(145deg, #1b1d27, #101219);
      border-color: var(--line-soft);
      box-shadow: var(--shadow-dark);
    }

    .contact-panel h3 {
      color: #fff;
    }

    .contact-panel p {
      color: var(--muted);
    }

    .contact-list {
      display: grid;
      gap: 12px;
      margin: 22px 0 0;
      padding: 0;
      list-style: none;
    }

    .contact-list li {
      display: flex;
      gap: 12px;
      align-items: flex-start;
      padding: 14px;
      border-radius: 17px;
      background: rgba(255,255,255,.055);
      border: 1px solid var(--line-soft);
      color: rgba(216,220,230,.88);
    }

    .contact-list i {
      color: var(--mint);
      margin-top: 4px;
    }

    .site-footer {
      padding: 62px 0 34px;
      color: var(--text);
      background:
        linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px),
        #11131a;
      background-size: 28px 28px;
      border-top: 1px solid var(--line-soft);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.05fr .75fr .8fr;
      gap: 28px;
      align-items: start;
    }

    .footer-brand p {
      color: var(--muted);
      margin: 16px 0 0;
      max-width: 520px;
    }

    .footer-title {
      color: #fff;
      font-size: 16px;
      font-weight: 950;
      margin: 0 0 14px;
    }

    .footer-links,
    .footer-info {
      display: grid;
      gap: 10px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .footer-links a,
    .footer-info li {
      color: var(--muted);
      font-size: 14px;
    }

    .footer-links a:hover,
    .footer-links a:focus {
      color: var(--mint);
      outline: none;
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
      margin-top: 34px;
      padding-top: 22px;
      border-top: 1px solid var(--line-soft);
      color: var(--muted);
      font-size: 13px;
    }

    @media (max-width: 1199.98px) {
      .hero-grid,
      .rules-wrap,
      .faq-layout,
      .feedback-layout,
      .news-layout {
        grid-template-columns: 1fr;
      }

      .coupon-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .ticket-card.large {
        grid-column: 1 / -1;
        min-height: auto;
      }

      .security-grid,
      .opinion-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .member-grid,
      .compare-wrap {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .faq-tip {
        position: static;
      }
    }

    @media (max-width: 991.98px) {
      body {
        background:
          radial-gradient(circle at 10% 0%, rgba(255, 184, 77, .14), transparent 34%),
          linear-gradient(180deg, #14151c 0, #14151c 620px, var(--paper) 620px, var(--paper) 100%);
      }

      .navbar-collapse {
        padding: 14px 0 18px;
      }

      .navbar-nav {
        align-items: stretch;
      }

      .nav-link {
        border-radius: 14px;
      }

      .desktop-cta {
        display: none !important;
      }

      .hero {
        padding-top: 36px;
      }

      .hero-stage {
        min-height: auto;
      }

      .dashboard-board {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .section {
        padding: 64px 0;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 767.98px) {
      body {
        padding-bottom: 86px;
      }

      .site-container {
        width: min(100% - 24px, var(--container));
      }

      .mobile-tabs {
        display: flex;
      }

      .brand-mark {
        font-size: 16px;
      }

      .brand-icon {
        width: 38px;
        height: 38px;
        border-radius: 13px;
      }

      .hero-stage {
        border-radius: 26px;
        padding: 24px;
      }

      .hero h1 {
        font-size: 36px;
      }

      .hero-actions {
        flex-direction: column;
      }

      .btn-site {
        width: 100%;
      }

      .dashboard-board,
      .coupon-grid,
      .security-grid,
      .opinion-grid,
      .member-grid,
      .compare-wrap {
        grid-template-columns: 1fr;
      }

      .metric-card {
        min-height: 132px;
      }

      .section-head.center {
        text-align: left;
      }

      .section-title {
        font-size: 28px;
      }

      .news-card {
        grid-template-columns: 1fr;
      }

      .news-arrow {
        justify-self: start;
      }

      .accordion-button {
        padding: 18px;
      }

      .accordion-body {
        padding: 16px 18px 20px;
      }

      .form-grid {
        grid-template-columns: 1fr;
      }

      .use-cta-grid {
        grid-template-columns: 1fr;
      }

      .footer-bottom {
        display: grid;
      }
    }

    @media (max-width: 520px) {
      .hero-lead,
      .section-desc {
        font-size: 15.5px;
      }

      .quick-index a {
        flex: 1 1 calc(50% - 10px);
        text-align: center;
      }

      .ticket-card,
      .rule-panel,
      .feedback-card,
      .contact-panel,
      .faq-tip {
        padding: 22px;
      }

      .mobile-tabs {
        left: 8px;
        right: 8px;
        bottom: 8px;
        bottom: calc(8px + env(safe-area-inset-bottom));
      }

      .mobile-tabs a {
        font-size: 11px;
      }
    }

/* roulang page: article */
:root {
      --ink: #11131a;
      --ink-2: #14151c;
      --panel: #1e212b;
      --panel-2: #252936;
      --paper: #f5f3ee;
      --paper-2: #ebe7dc;
      --line: rgba(49, 53, 67, .92);
      --line-soft: rgba(255, 255, 255, .12);
      --text: #d8dce6;
      --text-dark: #222632;
      --muted: #8f96a8;
      --muted-dark: #666d7d;
      --amber: #ffb84d;
      --amber-2: #f29b21;
      --mint: #32d6b0;
      --mint-2: #20b996;
      --danger: #ff6b6b;
      --ok: #4ee48b;
      --radius-xl: 26px;
      --radius-lg: 20px;
      --radius-md: 15px;
      --radius-sm: 11px;
      --shadow-dark: 0 24px 60px rgba(0, 0, 0, .34);
      --shadow-soft: 0 18px 45px rgba(17, 19, 26, .12);
      --shadow-card: 0 10px 24px rgba(17, 19, 26, .09);
      --container: 1220px;
      --nav-h: 74px;
      --ease: 180ms ease;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 96px;
    }

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
      color: var(--text-dark);
      background:
        radial-gradient(circle at 10% 0%, rgba(255, 184, 77, .13), transparent 30%),
        radial-gradient(circle at 90% 5%, rgba(50, 214, 176, .14), transparent 32%),
        linear-gradient(180deg, #14151c 0, #14151c 360px, var(--paper) 360px, var(--paper) 100%);
      line-height: 1.8;
      overflow-x: hidden;
      padding-bottom: 0;
      text-rendering: optimizeLegibility;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color var(--ease), border-color var(--ease), background var(--ease), transform var(--ease), box-shadow var(--ease), opacity var(--ease);
    }

    a:hover {
      color: var(--mint);
    }

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

    button, input, textarea, select {
      font: inherit;
    }

    input, textarea, select {
      outline: none;
    }

    ::selection {
      color: var(--ink);
      background: var(--mint);
    }

    .site-container {
      width: min(100% - 32px, var(--container));
      margin-inline: auto;
    }

    .navbar-shell {
      position: sticky;
      top: 0;
      z-index: 1040;
      min-height: var(--nav-h);
      background: rgba(17, 19, 26, .86);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid var(--line-soft);
      box-shadow: 0 10px 30px rgba(0, 0, 0, .18);
    }

    .navbar-shell .navbar {
      min-height: var(--nav-h);
      padding: 0;
    }

    .brand-mark {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      color: #fff;
      font-weight: 900;
      letter-spacing: -.02em;
      font-size: 18px;
      white-space: nowrap;
    }

    .brand-mark:hover {
      color: #fff;
      transform: translateY(-1px);
    }

    .brand-icon {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      position: relative;
      display: grid;
      place-items: center;
      color: var(--ink);
      background: linear-gradient(135deg, var(--amber), var(--mint));
      box-shadow: 0 12px 28px rgba(50, 214, 176, .18);
      overflow: hidden;
      flex: 0 0 auto;
    }

    .brand-icon::before,
    .brand-icon::after {
      content: "";
      position: absolute;
      width: 4px;
      height: 4px;
      border-radius: 50%;
      background: rgba(17, 19, 26, .55);
      left: 7px;
      box-shadow: 0 9px 0 rgba(17, 19, 26, .55), 0 18px 0 rgba(17, 19, 26, .55), 22px 0 0 rgba(17, 19, 26, .55), 22px 9px 0 rgba(17, 19, 26, .55), 22px 18px 0 rgba(17, 19, 26, .55);
    }

    .brand-icon i {
      position: relative;
      z-index: 1;
      font-size: 19px;
    }

    .navbar-toggler {
      border: 1px solid var(--line-soft);
      border-radius: 14px;
      padding: 9px 11px;
      color: var(--text);
      box-shadow: none !important;
      background: rgba(255, 255, 255, .06);
    }

    .navbar-toggler:focus {
      outline: 3px solid rgba(50, 214, 176, .28);
    }

    .navbar-nav {
      gap: 8px;
      align-items: center;
    }

    .nav-link {
      color: var(--text) !important;
      font-weight: 700;
      font-size: 15px;
      padding: 10px 16px !important;
      border-radius: 999px;
      border: 1px solid transparent;
    }

    .nav-link:hover,
    .nav-link:focus,
    .nav-link.active {
      color: var(--ink) !important;
      background: var(--mint);
      border-color: rgba(255, 255, 255, .12);
      outline: none;
    }

    .mobile-tabs {
      display: none;
      position: fixed;
      left: 12px;
      right: 12px;
      bottom: 12px;
      bottom: calc(12px + env(safe-area-inset-bottom));
      z-index: 1050;
      background: rgba(17, 19, 26, .92);
      border: 1px solid var(--line-soft);
      border-radius: 22px;
      box-shadow: 0 20px 55px rgba(0, 0, 0, .32);
      backdrop-filter: blur(16px);
      padding: 8px;
    }

    .mobile-tabs a {
      flex: 1;
      min-height: 52px;
      border-radius: 16px;
      display: inline-flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 2px;
      color: var(--muted);
      font-size: 12px;
      font-weight: 800;
    }

    .mobile-tabs a i {
      font-size: 19px;
      line-height: 1;
    }

    .mobile-tabs a.active,
    .mobile-tabs a:hover,
    .mobile-tabs a:focus {
      color: var(--ink);
      background: linear-gradient(135deg, var(--mint), var(--amber));
      outline: none;
    }

    .btn-site {
      --btn-bg: var(--amber);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      min-height: 48px;
      padding: 12px 20px;
      border-radius: 15px;
      border: 1px solid rgba(17, 19, 26, .12);
      background: var(--btn-bg);
      color: var(--ink);
      font-weight: 900;
      letter-spacing: .01em;
      box-shadow: 0 14px 34px rgba(255, 184, 77, .22);
      cursor: pointer;
      transition: transform var(--ease), box-shadow var(--ease), background var(--ease), border-color var(--ease), color var(--ease);
    }

    .btn-site:hover {
      color: var(--ink);
      background: var(--amber-2);
      transform: translateY(-2px);
      box-shadow: 0 18px 42px rgba(255, 184, 77, .28);
    }

    .btn-site:focus-visible {
      outline: 3px solid rgba(50, 214, 176, .35);
      outline-offset: 3px;
    }

    .btn-site:active {
      transform: translateY(0);
    }

    .btn-site.btn-mint {
      --btn-bg: var(--mint);
      box-shadow: 0 14px 34px rgba(50, 214, 176, .22);
    }

    .btn-site.btn-mint:hover {
      background: var(--mint-2);
      box-shadow: 0 18px 42px rgba(50, 214, 176, .28);
    }

    .btn-site.btn-ghost {
      color: var(--text);
      background: rgba(255, 255, 255, .06);
      border-color: var(--line-soft);
      box-shadow: none;
    }

    .btn-site.btn-ghost:hover {
      color: #fff;
      border-color: rgba(50, 214, 176, .55);
      background: rgba(50, 214, 176, .12);
    }

    .section {
      padding: 76px 0;
      position: relative;
    }

    .section-tight {
      padding: 44px 0;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border-radius: 999px;
      font-size: 13px;
      line-height: 1.2;
      color: var(--ink);
      background: linear-gradient(135deg, rgba(50, 214, 176, .95), rgba(255, 184, 77, .95));
      font-weight: 900;
      border: 1px solid rgba(255, 255, 255, .24);
    }

    .badge-soft {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      min-height: 30px;
      padding: 5px 10px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 800;
      color: var(--text);
      background: rgba(255, 255, 255, .07);
      border: 1px solid var(--line-soft);
    }

    .badge-soft.light {
      color: var(--text-dark);
      background: rgba(17, 19, 26, .06);
      border-color: rgba(49, 53, 67, .14);
    }

    .badge-soft.mint {
      color: var(--ink);
      background: rgba(50, 214, 176, .88);
      border-color: rgba(50, 214, 176, .36);
    }

    .badge-soft.amber {
      color: var(--ink);
      background: rgba(255, 184, 77, .88);
      border-color: rgba(255, 184, 77, .36);
    }

    .article-hero {
      padding: 42px 0 28px;
      color: var(--text);
      position: relative;
      overflow: hidden;
    }

    .article-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      pointer-events: none;
      background-image:
        linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
      background-size: 34px 34px;
      mask-image: linear-gradient(180deg, #000, transparent 92%);
    }

    .article-topbar {
      position: relative;
      z-index: 1;
      padding: 24px;
      border-radius: var(--radius-xl);
      background:
        linear-gradient(135deg, rgba(30, 33, 43, .96), rgba(20, 21, 28, .96)),
        radial-gradient(circle at 88% 15%, rgba(50, 214, 176, .22), transparent 34%);
      border: 1px solid var(--line-soft);
      box-shadow: var(--shadow-dark);
    }

    .breadcrumb-line {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 8px;
      color: var(--muted);
      font-size: 14px;
      margin-bottom: 18px;
    }

    .breadcrumb-line a {
      color: var(--text);
      border-bottom: 1px dashed rgba(216, 220, 230, .35);
    }

    .breadcrumb-line a:hover {
      color: var(--mint);
      border-bottom-color: var(--mint);
    }

    .breadcrumb-line .sep {
      color: rgba(216, 220, 230, .28);
    }

    .article-title-wrap {
      max-width: 910px;
    }

    .article-title-wrap h1 {
      margin: 16px 0 16px;
      color: #fff;
      font-size: clamp(30px, 4.8vw, 48px);
      line-height: 1.18;
      letter-spacing: -.045em;
      font-weight: 950;
    }

    .article-summary {
      margin: 0;
      max-width: 820px;
      color: rgba(216, 220, 230, .86);
      font-size: 17px;
      line-height: 1.9;
    }

    .meta-row {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 22px;
    }

    .article-quick-panel {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 12px;
      margin-top: 24px;
    }

    .quick-stat {
      min-height: 98px;
      border-radius: 18px;
      padding: 15px;
      background: rgba(255, 255, 255, .055);
      border: 1px solid var(--line-soft);
      position: relative;
      overflow: hidden;
    }

    .quick-stat::after {
      content: "";
      position: absolute;
      width: 74px;
      height: 74px;
      border-radius: 50%;
      right: -34px;
      top: -34px;
      background: rgba(50, 214, 176, .13);
    }

    .quick-stat i {
      color: var(--amber);
      font-size: 20px;
      margin-bottom: 8px;
    }

    .quick-stat span {
      display: block;
      color: var(--muted);
      font-size: 12px;
      font-weight: 800;
      line-height: 1.3;
    }

    .quick-stat strong {
      display: block;
      color: #fff;
      font-size: 15px;
      line-height: 1.45;
      margin-top: 3px;
      font-weight: 900;
      word-break: break-word;
    }

    .article-layout {
      display: grid;
      grid-template-columns: minmax(0, 820px) 320px;
      gap: 28px;
      align-items: start;
    }

    .reader-card,
    .side-card,
    .related-card,
    .feedback-card,
    .hint-card {
      background: rgba(255, 255, 255, .72);
      border: 1px solid rgba(49, 53, 67, .13);
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-card);
    }

    .reader-card {
      padding: 34px;
      overflow: hidden;
    }

    .article-body {
      max-width: 760px;
      margin-inline: auto;
      color: var(--text-dark);
      font-size: 17px;
      line-height: 1.92;
      word-break: break-word;
    }

    .article-body > *:first-child {
      margin-top: 0;
    }

    .article-body p {
      margin: 0 0 1.18em;
    }

    .article-body h2,
    .article-body h3,
    .article-body h4 {
      color: var(--ink);
      letter-spacing: -.025em;
      font-weight: 950;
    }

    .article-body h2 {
      position: relative;
      margin: 2.2em 0 .8em;
      padding-left: 18px;
      font-size: clamp(24px, 3vw, 32px);
      line-height: 1.28;
    }

    .article-body h2::before {
      content: "";
      position: absolute;
      left: 0;
      top: .28em;
      width: 6px;
      height: 1.05em;
      border-radius: 999px;
      background: linear-gradient(180deg, var(--mint), var(--amber));
    }

    .article-body h3 {
      margin: 1.8em 0 .7em;
      font-size: 22px;
      line-height: 1.35;
    }

    .article-body h4 {
      margin: 1.4em 0 .5em;
      font-size: 18px;
    }

    .article-body a {
      color: #0d9278;
      font-weight: 800;
      border-bottom: 1px solid rgba(13, 146, 120, .35);
    }

    .article-body a:hover {
      color: var(--amber-2);
      border-bottom-color: var(--amber-2);
    }

    .article-body ul,
    .article-body ol {
      margin: 0 0 1.25em;
      padding-left: 1.35em;
    }

    .article-body li {
      margin: .38em 0;
      padding-left: .15em;
    }

    .article-body blockquote {
      margin: 1.5em 0;
      padding: 18px 20px;
      border-left: 5px solid var(--mint);
      border-radius: 0 18px 18px 0;
      color: var(--text-dark);
      background: linear-gradient(90deg, rgba(50, 214, 176, .14), rgba(50, 214, 176, .04));
      font-weight: 700;
    }

    .article-body img {
      margin: 1.5em auto .6em;
      border-radius: 20px;
      border: 1px solid rgba(49, 53, 67, .13);
      box-shadow: var(--shadow-card);
    }

    .article-body figure {
      margin: 1.6em 0;
    }

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

    .article-body table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      margin: 1.5em 0;
      overflow: hidden;
      border-radius: 18px;
      border: 1px solid rgba(49, 53, 67, .15);
      font-size: 15px;
      background: rgba(255, 255, 255, .76);
    }

    .article-body th,
    .article-body td {
      padding: 12px 14px;
      border-bottom: 1px solid rgba(49, 53, 67, .1);
      vertical-align: top;
    }

    .article-body th {
      color: var(--ink);
      background: rgba(50, 214, 176, .12);
      font-weight: 950;
    }

    .article-body tr:nth-child(even) td {
      background: rgba(17, 19, 26, .025);
    }

    .article-body tr:last-child td {
      border-bottom: 0;
    }

    .article-body pre {
      padding: 18px;
      border-radius: 18px;
      color: var(--text);
      background: var(--ink);
      border: 1px solid var(--line-soft);
      overflow-x: auto;
      font-size: 14px;
      line-height: 1.7;
    }

    .article-body code {
      padding: .12em .38em;
      border-radius: 7px;
      color: #0c765f;
      background: rgba(50, 214, 176, .14);
      font-size: .92em;
    }

    .article-body pre code {
      padding: 0;
      color: inherit;
      background: transparent;
    }

    .not-found-box {
      max-width: 680px;
      margin-inline: auto;
      padding: 34px;
      border-radius: var(--radius-xl);
      text-align: center;
      background:
        linear-gradient(135deg, rgba(255, 184, 77, .14), rgba(50, 214, 176, .1)),
        rgba(255, 255, 255, .72);
      border: 1px dashed rgba(49, 53, 67, .24);
    }

    .not-found-box i {
      display: inline-grid;
      place-items: center;
      width: 58px;
      height: 58px;
      margin-bottom: 12px;
      border-radius: 20px;
      color: var(--ink);
      background: linear-gradient(135deg, var(--amber), var(--mint));
      font-size: 26px;
    }

    .not-found-box h2 {
      margin: 0 0 8px;
      color: var(--ink);
      font-size: 26px;
      font-weight: 950;
    }

    .not-found-box p {
      margin: 0 0 20px;
      color: var(--muted-dark);
    }

    .side-stack {
      display: grid;
      gap: 16px;
      position: sticky;
      top: 94px;
    }

    .side-card {
      padding: 20px;
    }

    .side-title {
      display: flex;
      align-items: center;
      gap: 9px;
      margin: 0 0 14px;
      color: var(--ink);
      font-size: 16px;
      font-weight: 950;
    }

    .side-title i {
      color: var(--mint-2);
      font-size: 18px;
    }

    .info-list {
      display: grid;
      gap: 10px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .info-list li {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 12px;
      padding: 10px 0;
      border-bottom: 1px solid rgba(49, 53, 67, .1);
      color: var(--muted-dark);
      font-size: 14px;
      line-height: 1.55;
    }

    .info-list li:last-child {
      border-bottom: 0;
      padding-bottom: 0;
    }

    .info-list strong {
      color: var(--text-dark);
      text-align: right;
      font-weight: 900;
      max-width: 170px;
      word-break: break-word;
    }

    .toc-list {
      display: grid;
      gap: 8px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .toc-list a,
    .toc-empty {
      display: flex;
      align-items: flex-start;
      gap: 8px;
      padding: 10px 12px;
      border-radius: 13px;
      color: var(--muted-dark);
      background: rgba(17, 19, 26, .04);
      border: 1px solid rgba(49, 53, 67, .08);
      font-size: 14px;
      font-weight: 800;
      line-height: 1.5;
    }

    .toc-list a::before {
      content: "";
      width: 6px;
      height: 6px;
      margin-top: .62em;
      border-radius: 50%;
      background: var(--mint);
      flex: 0 0 auto;
    }

    .toc-list a:hover,
    .toc-list a.active {
      color: var(--ink);
      background: rgba(50, 214, 176, .14);
      border-color: rgba(50, 214, 176, .34);
      transform: translateX(2px);
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .tag-cloud span,
    .tag-cloud a {
      display: inline-flex;
      align-items: center;
      min-height: 30px;
      padding: 5px 10px;
      border-radius: 999px;
      color: var(--text-dark);
      background: rgba(255, 184, 77, .15);
      border: 1px solid rgba(255, 184, 77, .24);
      font-size: 13px;
      font-weight: 850;
    }

    .tag-cloud a:hover {
      color: var(--ink);
      background: var(--amber);
      border-color: var(--amber);
    }

    .side-actions {
      display: grid;
      gap: 10px;
    }

    .side-link {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 12px 14px;
      border-radius: 15px;
      color: var(--text-dark);
      background: rgba(17, 19, 26, .04);
      border: 1px solid rgba(49, 53, 67, .1);
      font-weight: 900;
    }

    .side-link:hover {
      color: var(--ink);
      border-color: rgba(50, 214, 176, .42);
      background: rgba(50, 214, 176, .12);
      transform: translateY(-2px);
    }

    .related-section {
      padding-top: 0;
    }

    .section-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 20px;
      margin-bottom: 22px;
    }

    .section-head h2 {
      margin: 0;
      color: var(--ink);
      font-size: clamp(26px, 3vw, 34px);
      line-height: 1.28;
      letter-spacing: -.035em;
      font-weight: 950;
    }

    .section-head p {
      max-width: 560px;
      margin: 8px 0 0;
      color: var(--muted-dark);
      font-size: 15px;
      line-height: 1.8;
    }

    .related-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }

    .related-card {
      min-height: 210px;
      padding: 20px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      overflow: hidden;
      position: relative;
      transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease), background var(--ease);
    }

    .related-card::after {
      content: "";
      position: absolute;
      inset: auto -30px -40px auto;
      width: 110px;
      height: 110px;
      border-radius: 50%;
      background: rgba(50, 214, 176, .1);
      pointer-events: none;
    }

    .related-card:hover {
      transform: translateY(-3px);
      border-color: rgba(50, 214, 176, .38);
      box-shadow: var(--shadow-soft);
      background: #fff;
    }

    .related-card h3 {
      margin: 0;
      color: var(--ink);
      font-size: 19px;
      line-height: 1.45;
      font-weight: 950;
    }

    .related-card p {
      margin: 0;
      color: var(--muted-dark);
      font-size: 14px;
      line-height: 1.75;
      display: -webkit-box;
      -webkit-line-clamp: 3;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .related-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: auto;
      color: var(--muted-dark);
      font-size: 13px;
      font-weight: 800;
    }

    .feedback-wrap {
      padding: 70px 0 86px;
    }

    .feedback-panel {
      display: grid;
      grid-template-columns: minmax(0, 1.12fr) minmax(280px, .88fr);
      gap: 18px;
      padding: 20px;
      border-radius: 30px;
      color: var(--text);
      background:
        radial-gradient(circle at 20% 12%, rgba(255, 184, 77, .17), transparent 32%),
        radial-gradient(circle at 84% 22%, rgba(50, 214, 176, .18), transparent 30%),
        linear-gradient(135deg, var(--panel), var(--ink));
      border: 1px solid var(--line-soft);
      box-shadow: var(--shadow-dark);
    }

    .feedback-card {
      padding: 26px;
      color: var(--text);
      background: rgba(255, 255, 255, .06);
      border-color: var(--line-soft);
      box-shadow: none;
    }

    .feedback-card h2,
    .hint-card h2 {
      margin: 0 0 10px;
      color: #fff;
      font-size: 28px;
      line-height: 1.25;
      font-weight: 950;
      letter-spacing: -.03em;
    }

    .feedback-card p,
    .hint-card p {
      margin: 0 0 18px;
      color: rgba(216, 220, 230, .76);
      line-height: 1.85;
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    .form-field {
      display: grid;
      gap: 7px;
    }

    .form-field.full {
      grid-column: 1 / -1;
    }

    .form-field label {
      color: rgba(216, 220, 230, .9);
      font-size: 13px;
      font-weight: 900;
    }

    .form-control,
    .form-select {
      min-height: 50px;
      border-radius: 15px;
      color: #fff;
      background: rgba(17, 19, 26, .52);
      border: 1px solid var(--line-soft);
      box-shadow: none !important;
    }

    .form-control::placeholder {
      color: rgba(216, 220, 230, .42);
    }

    .form-control:focus,
    .form-select:focus {
      color: #fff;
      background: rgba(17, 19, 26, .64);
      border-color: var(--mint);
      outline: 3px solid rgba(50, 214, 176, .16);
    }

    textarea.form-control {
      min-height: 132px;
      resize: vertical;
    }

    .form-select option {
      color: var(--text-dark);
    }

    .form-note {
      margin-top: 12px;
      color: rgba(216, 220, 230, .6);
      font-size: 13px;
      line-height: 1.7;
    }

    .hint-card {
      padding: 26px;
      color: var(--text);
      background:
        linear-gradient(180deg, rgba(255, 255, 255, .08), rgba(255, 255, 255, .04));
      border-color: var(--line-soft);
      box-shadow: none;
    }

    .hint-list {
      display: grid;
      gap: 12px;
      margin: 18px 0 0;
      padding: 0;
      list-style: none;
    }

    .hint-list li {
      display: flex;
      gap: 12px;
      padding: 13px;
      border-radius: 17px;
      background: rgba(255, 255, 255, .06);
      border: 1px solid var(--line-soft);
    }

    .hint-list i {
      display: grid;
      place-items: center;
      width: 34px;
      height: 34px;
      border-radius: 12px;
      color: var(--ink);
      background: var(--amber);
      flex: 0 0 auto;
    }

    .hint-list strong {
      display: block;
      color: #fff;
      line-height: 1.4;
      margin-bottom: 2px;
      font-weight: 950;
    }

    .hint-list span {
      display: block;
      color: rgba(216, 220, 230, .68);
      font-size: 13px;
      line-height: 1.65;
    }

    .site-footer {
      padding: 58px 0 28px;
      color: var(--text);
      background:
        linear-gradient(180deg, #14151c, #0f1117);
      border-top: 1px solid var(--line-soft);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.2fr) .7fr 1fr;
      gap: 28px;
      align-items: start;
    }

    .footer-brand p {
      max-width: 430px;
      margin: 16px 0 0;
      color: var(--muted);
      line-height: 1.85;
      font-size: 14px;
    }

    .footer-title {
      margin: 6px 0 14px;
      color: #fff;
      font-size: 16px;
      font-weight: 950;
    }

    .footer-links,
    .footer-info {
      display: grid;
      gap: 9px;
      margin: 0;
      padding: 0;
      list-style: none;
      color: var(--muted);
      font-size: 14px;
    }

    .footer-links a {
      color: var(--muted);
    }

    .footer-links a:hover {
      color: var(--mint);
      padding-left: 3px;
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      margin-top: 36px;
      padding-top: 20px;
      border-top: 1px solid var(--line-soft);
      color: rgba(216, 220, 230, .52);
      font-size: 13px;
    }

    @media (max-width: 1199.98px) {
      .article-quick-panel {
        grid-template-columns: repeat(2, 1fr);
      }

      .article-layout {
        grid-template-columns: minmax(0, 1fr) 300px;
        gap: 22px;
      }

      .reader-card {
        padding: 28px;
      }
    }

    @media (max-width: 991.98px) {
      body {
        background:
          radial-gradient(circle at 8% 0%, rgba(255, 184, 77, .13), transparent 28%),
          radial-gradient(circle at 94% 5%, rgba(50, 214, 176, .13), transparent 30%),
          linear-gradient(180deg, #14151c 0, #14151c 430px, var(--paper) 430px, var(--paper) 100%);
      }

      .navbar-collapse {
        margin-top: 12px;
        padding: 14px;
        border-radius: 20px;
        background: rgba(17, 19, 26, .94);
        border: 1px solid var(--line-soft);
      }

      .navbar-nav {
        align-items: stretch;
      }

      .desktop-cta {
        width: 100%;
        margin-top: 10px;
      }

      .article-layout {
        grid-template-columns: 1fr;
      }

      .side-stack {
        position: static;
        grid-template-columns: repeat(2, 1fr);
      }

      .side-card.toc-card,
      .side-card.actions-card {
        grid-column: 1 / -1;
      }

      .related-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .feedback-panel,
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 767.98px) {
      body {
        padding-bottom: 86px;
      }

      .site-container {
        width: min(100% - 24px, var(--container));
      }

      .mobile-tabs {
        display: flex;
      }

      .article-hero {
        padding-top: 26px;
      }

      .article-topbar {
        padding: 18px;
        border-radius: 22px;
      }

      .article-summary {
        font-size: 15.5px;
      }

      .article-quick-panel {
        grid-template-columns: 1fr;
      }

      .section {
        padding: 52px 0;
      }

      .reader-card {
        padding: 22px 18px;
        border-radius: 22px;
      }

      .article-body {
        font-size: 16px;
        line-height: 1.9;
      }

      .article-body h2 {
        font-size: 24px;
      }

      .article-body h3 {
        font-size: 20px;
      }

      .article-body table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
      }

      .side-stack,
      .related-grid {
        grid-template-columns: 1fr;
      }

      .section-head {
        display: block;
      }

      .feedback-wrap {
        padding: 48px 0 64px;
      }

      .feedback-panel {
        padding: 14px;
        border-radius: 24px;
      }

      .feedback-card,
      .hint-card {
        padding: 20px;
        border-radius: 20px;
      }

      .form-grid {
        grid-template-columns: 1fr;
      }

      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }

    @media (max-width: 520px) {
      .brand-mark {
        font-size: 16px;
        gap: 9px;
      }

      .brand-icon {
        width: 38px;
        height: 38px;
        border-radius: 13px;
      }

      .article-title-wrap h1 {
        font-size: 29px;
      }

      .meta-row {
        gap: 8px;
      }

      .badge-soft {
        font-size: 12px;
      }

      .not-found-box {
        padding: 24px 18px;
      }
    }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}