/* roulang page: index */
:root {
      --primary: #2563EB;
      --primary-strong: #1D4ED8;
      --primary-soft: #EEF4FF;
      --primary-faint: #F6F9FF;
      --accent: #38BDF8;
      --violet: #7C3AED;
      --warning: #F59E0B;
      --success: #10B981;
      --text: #111827;
      --text-soft: #5B6472;
      --text-muted: #8A94A6;
      --bg: #F6F8FC;
      --white: #FFFFFF;
      --line: #E4EAF3;
      --line-strong: #D7E0EE;
      --shadow-sm: 0 8px 24px rgba(30, 64, 175, 0.06);
      --shadow-md: 0 12px 36px rgba(30, 64, 175, 0.08);
      --shadow-lg: 0 22px 56px rgba(30, 64, 175, 0.12);
      --radius-sm: 12px;
      --radius-md: 18px;
      --radius-lg: 24px;
      --radius-xl: 32px;
      --container: 1200px;
      --ease: 180ms ease;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
      color: var(--text);
      background:
        radial-gradient(circle at 12% 4%, rgba(37, 99, 235, 0.10), transparent 30%),
        radial-gradient(circle at 92% 12%, rgba(56, 189, 248, 0.16), transparent 28%),
        linear-gradient(180deg, #FFFFFF 0%, var(--bg) 42%, #FFFFFF 100%);
      line-height: 1.75;
      font-size: 16px;
      overflow-x: hidden;
    }

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

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

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

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

    button,
    .button {
      cursor: pointer;
    }

    input:focus,
    textarea:focus,
    select:focus,
    button:focus,
    a:focus {
      outline: 3px solid rgba(37, 99, 235, 0.20);
      outline-offset: 3px;
    }

    h1, h2, h3, h4, p {
      margin-top: 0;
    }

    h1 {
      font-size: clamp(2rem, 5vw, 3.25rem);
      line-height: 1.16;
      font-weight: 800;
      letter-spacing: -0.03em;
      color: var(--text);
      margin-bottom: 18px;
    }

    h2 {
      font-size: clamp(1.75rem, 3vw, 2.35rem);
      line-height: 1.22;
      font-weight: 800;
      letter-spacing: -0.02em;
      margin-bottom: 14px;
      color: var(--text);
    }

    h3 {
      font-size: 1.28rem;
      line-height: 1.35;
      font-weight: 760;
      margin-bottom: 10px;
    }

    p {
      color: var(--text-soft);
    }

    .grid-container {
      max-width: var(--container);
    }

    .section {
      padding: 82px 0;
      position: relative;
    }

    .section-tight {
      padding: 58px 0;
    }

    .section-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 28px;
      margin-bottom: 34px;
    }

    .section-head .lead {
      max-width: 680px;
      margin-bottom: 0;
      font-size: 1.03rem;
      color: var(--text-soft);
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border-radius: 999px;
      color: var(--primary);
      background: var(--primary-soft);
      border: 1px solid rgba(37, 99, 235, 0.12);
      font-size: 0.9rem;
      font-weight: 700;
      margin-bottom: 14px;
    }

    .eyebrow .dot {
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: var(--success);
      box-shadow: 0 0 0 5px rgba(16, 185, 129, 0.12);
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255, 255, 255, 0.94);
      border-bottom: 1px solid rgba(228, 234, 243, 0.86);
      box-shadow: 0 10px 30px rgba(17, 24, 39, 0.035);
      backdrop-filter: blur(10px);
    }

    .nav-wrap {
      min-height: 74px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 22px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 850;
      color: var(--text);
      letter-spacing: -0.02em;
      white-space: nowrap;
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      color: #fff;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      box-shadow: 0 12px 24px rgba(37, 99, 235, 0.22);
      position: relative;
      overflow: hidden;
      font-size: 0.88rem;
    }

    .brand-mark::after {
      content: "";
      position: absolute;
      width: 18px;
      height: 18px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.26);
      right: -4px;
      top: -4px;
    }

    .brand-name {
      font-size: 1.08rem;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 18px;
      margin-left: auto;
    }

    .nav-menu .menu {
      gap: 8px;
      align-items: center;
      background: transparent;
    }

    .nav-menu .menu a {
      padding: 10px 16px;
      border-radius: 999px;
      color: var(--text-soft);
      font-weight: 700;
      font-size: 0.95rem;
    }

    .nav-menu .menu a:hover,
    .nav-menu .menu a.active {
      background: var(--primary-soft);
      color: var(--primary);
    }

    .title-bar {
      display: none;
      background: transparent;
      padding: 0;
    }

    .menu-icon {
      width: 42px;
      height: 42px;
      border-radius: 13px;
      background: var(--primary-soft);
      border: 1px solid rgba(37, 99, 235, 0.12);
      color: var(--primary);
    }

    .menu-icon::after {
      background: var(--primary);
      box-shadow: 0 7px 0 var(--primary), 0 14px 0 var(--primary);
      left: 11px;
      width: 20px;
    }

    .btn,
    .button.btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      border: 0;
      border-radius: 999px;
      padding: 13px 20px;
      min-height: 48px;
      font-weight: 800;
      line-height: 1;
      transition: transform var(--ease), box-shadow var(--ease), background var(--ease), border-color var(--ease), color var(--ease);
      margin: 0;
    }

    .btn-primary {
      color: #fff;
      background: linear-gradient(135deg, var(--primary), #2F6FEB);
      box-shadow: 0 14px 28px rgba(37, 99, 235, 0.22);
    }

    .btn-primary:hover {
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 18px 36px rgba(37, 99, 235, 0.28);
      background: linear-gradient(135deg, var(--primary-strong), var(--primary));
    }

    .btn-secondary {
      color: var(--primary);
      background: #fff;
      border: 1px solid rgba(37, 99, 235, 0.20);
      box-shadow: var(--shadow-sm);
    }

    .btn-secondary:hover {
      transform: translateY(-2px);
      color: var(--primary-strong);
      background: var(--primary-soft);
      box-shadow: var(--shadow-md);
    }

    .btn-ghost {
      color: var(--text-soft);
      background: rgba(255, 255, 255, 0.72);
      border: 1px solid var(--line);
    }

    .btn-ghost:hover {
      color: var(--primary);
      border-color: rgba(37, 99, 235, 0.22);
      background: #fff;
    }

    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 42px;
      padding: 10px 18px;
      border-radius: 999px;
      color: #fff;
      font-weight: 800;
      background: var(--primary);
      box-shadow: 0 10px 22px rgba(37, 99, 235, 0.20);
    }

    .nav-cta:hover {
      color: #fff;
      transform: translateY(-2px);
      background: var(--primary-strong);
    }

    .hero {
      padding: 34px 0 80px;
    }

    .profile-stage {
      position: relative;
      border-radius: var(--radius-xl);
      overflow: hidden;
      background:
        linear-gradient(135deg, rgba(37, 99, 235, 0.92), rgba(56, 189, 248, 0.74)),
        radial-gradient(circle at 80% 20%, rgba(255,255,255,0.45), transparent 28%);
      box-shadow: var(--shadow-lg);
      min-height: 430px;
      isolation: isolate;
    }

    .profile-stage::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(255,255,255,0.16) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.16) 1px, transparent 1px);
      background-size: 34px 34px;
      opacity: 0.22;
      z-index: -1;
    }

    .profile-stage::after {
      content: "";
      position: absolute;
      width: 330px;
      height: 330px;
      right: -80px;
      bottom: -120px;
      border-radius: 50%;
      background: rgba(255,255,255,0.22);
      z-index: -1;
    }

    .hero-inner {
      padding: clamp(28px, 5vw, 56px);
      min-height: 430px;
      display: grid;
      align-content: end;
    }

    .profile-row {
      display: flex;
      align-items: center;
      gap: 18px;
      margin-bottom: 24px;
      flex-wrap: wrap;
    }

    .avatar {
      width: 82px;
      height: 82px;
      border-radius: 26px;
      display: grid;
      place-items: center;
      color: #fff;
      font-size: 1.36rem;
      font-weight: 900;
      letter-spacing: 0.02em;
      background: rgba(255,255,255,0.18);
      border: 1px solid rgba(255,255,255,0.42);
      box-shadow: 0 18px 36px rgba(15, 23, 42, 0.16);
    }

    .profile-meta {
      color: #fff;
    }

    .profile-meta strong {
      display: flex;
      align-items: center;
      gap: 9px;
      font-size: 1.22rem;
      margin-bottom: 4px;
    }

    .verify {
      display: inline-flex;
      align-items: center;
      gap: 5px;
      padding: 4px 9px;
      border-radius: 999px;
      background: rgba(255,255,255,0.18);
      font-size: 0.76rem;
      font-weight: 800;
    }

    .profile-meta span {
      display: block;
      color: rgba(255,255,255,0.86);
      font-size: 0.94rem;
    }

    .hero h1 {
      max-width: 820px;
      color: #fff;
      text-shadow: 0 10px 26px rgba(30, 64, 175, 0.16);
      margin-bottom: 16px;
    }

    .hero-desc {
      max-width: 820px;
      color: rgba(255,255,255,0.92);
      font-size: 1.08rem;
      line-height: 1.82;
      margin-bottom: 28px;
    }

    .hero-actions {
      display: flex;
      gap: 13px;
      flex-wrap: wrap;
      margin-bottom: 32px;
    }

    .hero .btn-secondary {
      background: rgba(255,255,255,0.94);
    }

    .hero .btn-ghost {
      color: #fff;
      background: rgba(255,255,255,0.14);
      border-color: rgba(255,255,255,0.32);
    }

    .hero .btn-ghost:hover {
      background: rgba(255,255,255,0.24);
      color: #fff;
    }

    .badge-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
      max-width: 980px;
    }

    .data-badge {
      min-height: 94px;
      padding: 16px;
      border-radius: 20px;
      background: rgba(255,255,255,0.92);
      border: 1px solid rgba(255,255,255,0.62);
      box-shadow: 0 16px 36px rgba(15, 23, 42, 0.10);
    }

    .data-badge span {
      display: block;
      color: var(--text-muted);
      font-size: 0.86rem;
      font-weight: 700;
    }

    .data-badge strong {
      display: block;
      color: var(--primary);
      font-size: 1.5rem;
      line-height: 1.2;
      margin: 7px 0 4px;
    }

    .data-badge small {
      color: var(--text-soft);
      font-weight: 650;
    }

    .floating-follow {
      position: absolute;
      top: 28px;
      right: 28px;
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 12px 16px;
      border-radius: 999px;
      background: rgba(255,255,255,0.94);
      color: var(--primary);
      font-weight: 850;
      box-shadow: 0 18px 36px rgba(15, 23, 42, 0.13);
      border: 1px solid rgba(255,255,255,0.64);
    }

    .floating-follow:hover {
      transform: translateY(-2px);
      color: var(--primary-strong);
    }

    .card {
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
      overflow: hidden;
    }

    .card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: rgba(37, 99, 235, 0.22);
    }

    .about-panel {
      padding: 30px;
      min-height: 100%;
    }

    .about-panel p {
      margin-bottom: 20px;
    }

    .notice-line {
      display: flex;
      gap: 12px;
      align-items: flex-start;
      padding: 14px 16px;
      border-radius: 16px;
      background: #FFF8EC;
      border: 1px solid rgba(245, 158, 11, 0.20);
      color: #8A5A00;
      font-weight: 650;
      font-size: 0.95rem;
    }

    .notice-line i {
      color: var(--warning);
      margin-top: 4px;
    }

    .kpi-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      height: 100%;
    }

    .kpi-card {
      padding: 22px;
      border-radius: 22px;
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow-sm);
    }

    .kpi-card .icon {
      width: 42px;
      height: 42px;
      display: grid;
      place-items: center;
      color: var(--primary);
      background: var(--primary-soft);
      border-radius: 14px;
      margin-bottom: 14px;
    }

    .kpi-card strong {
      display: block;
      font-size: 1.55rem;
      color: var(--text);
      line-height: 1.2;
      margin-bottom: 5px;
    }

    .kpi-card span {
      display: block;
      color: var(--text-soft);
      font-weight: 650;
      font-size: 0.94rem;
    }

    .news-layout {
      display: grid;
      grid-template-columns: minmax(0, 1.65fr) minmax(280px, 0.75fr);
      gap: 24px;
    }

    .news-list {
      display: grid;
      gap: 14px;
    }

    .news-item {
      display: grid;
      grid-template-columns: 128px minmax(0, 1fr) 42px;
      gap: 18px;
      align-items: center;
      padding: 20px;
      border-radius: 22px;
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow-sm);
    }

    .news-item:hover {
      transform: translateY(-2px);
      border-color: rgba(37, 99, 235, 0.25);
      box-shadow: var(--shadow-md);
    }

    .news-meta {
      display: grid;
      gap: 8px;
    }

    .tag {
      display: inline-flex;
      width: fit-content;
      align-items: center;
      gap: 6px;
      padding: 6px 10px;
      border-radius: 999px;
      background: var(--primary-soft);
      color: var(--primary);
      font-size: 0.82rem;
      font-weight: 800;
      border: 1px solid rgba(37, 99, 235, 0.10);
    }

    .time {
      color: var(--text-muted);
      font-size: 0.88rem;
      font-weight: 650;
    }

    .news-title {
      font-size: 1.08rem;
      line-height: 1.42;
      margin-bottom: 7px;
    }

    .news-summary {
      margin: 0;
      color: var(--text-soft);
      font-size: 0.96rem;
      line-height: 1.65;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .arrow-link {
      width: 42px;
      height: 42px;
      display: grid;
      place-items: center;
      border-radius: 14px;
      color: var(--primary);
      background: var(--primary-soft);
      border: 1px solid rgba(37, 99, 235, 0.12);
    }

    .news-item:hover .arrow-link {
      transform: translateX(3px);
      background: var(--primary);
      color: #fff;
    }

    .empty-state {
      padding: 34px;
      border-radius: 24px;
      background:
        radial-gradient(circle at 8% 14%, rgba(37, 99, 235, 0.10), transparent 22%),
        #fff;
      border: 1px dashed rgba(37, 99, 235, 0.28);
      color: var(--text-soft);
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .empty-icon {
      width: 64px;
      height: 64px;
      margin: 0 auto 14px;
      display: grid;
      place-items: center;
      border-radius: 22px;
      color: var(--primary);
      background: var(--primary-soft);
      font-size: 1.45rem;
    }

    .recommend-card {
      padding: 24px;
      position: sticky;
      top: 98px;
    }

    .recommend-card h3 {
      margin-bottom: 12px;
    }

    .recommend-card p {
      font-size: 0.96rem;
      margin-bottom: 18px;
    }

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

    .mini-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      color: var(--text-soft);
      font-weight: 650;
      font-size: 0.94rem;
    }

    .mini-list i {
      color: var(--success);
      margin-top: 5px;
    }

    .service-matrix {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 22px;
      align-items: stretch;
    }

    .service-feature {
      padding: 30px;
      background:
        linear-gradient(135deg, #FFFFFF 0%, #F2F7FF 100%);
      min-height: 100%;
    }

    .status-row {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin: 22px 0;
    }

    .status-pill {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 8px 12px;
      border-radius: 999px;
      background: #fff;
      border: 1px solid var(--line);
      color: var(--text-soft);
      font-weight: 750;
      font-size: 0.9rem;
    }

    .status-pill::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: var(--success);
    }

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

    .service-tile {
      padding: 20px;
      border-radius: 22px;
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow-sm);
    }

    .service-tile:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: rgba(37, 99, 235, 0.22);
    }

    .tile-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      margin-bottom: 14px;
    }

    .tile-icon {
      width: 44px;
      height: 44px;
      display: grid;
      place-items: center;
      border-radius: 15px;
      color: var(--primary);
      background: var(--primary-soft);
    }

    .version {
      color: var(--text-muted);
      font-size: 0.78rem;
      font-weight: 800;
      background: #F8FAFC;
      border: 1px solid var(--line);
      border-radius: 999px;
      padding: 5px 9px;
    }

    .service-tile p,
    .service-feature p {
      margin-bottom: 0;
      font-size: 0.96rem;
    }

    .compare-wrap {
      padding: 10px;
      border-radius: var(--radius-xl);
      background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(56, 189, 248, 0.08));
      border: 1px solid rgba(37, 99, 235, 0.10);
    }

    .compare-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
    }

    .compare-col {
      padding: 26px;
      border-radius: 24px;
      background: rgba(255,255,255,0.92);
      border: 1px solid var(--line);
    }

    .compare-col.highlight {
      border-color: rgba(37, 99, 235, 0.28);
      box-shadow: var(--shadow-md);
    }

    .compare-col h3 {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 18px;
    }

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

    .compare-list li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      color: var(--text-soft);
      font-weight: 650;
    }

    .compare-list i {
      margin-top: 5px;
    }

    .compare-list .muted i {
      color: var(--text-muted);
    }

    .compare-list .good i {
      color: var(--success);
    }

    .access-board {
      display: grid;
      grid-template-columns: 0.85fr 1.15fr;
      gap: 22px;
      align-items: stretch;
    }

    .access-card {
      padding: 28px;
    }

    .access-steps {
      display: grid;
      gap: 14px;
    }

    .step-item {
      display: grid;
      grid-template-columns: 48px minmax(0, 1fr);
      gap: 14px;
      padding: 18px;
      border-radius: 20px;
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow-sm);
    }

    .step-num {
      width: 48px;
      height: 48px;
      display: grid;
      place-items: center;
      border-radius: 16px;
      background: var(--primary-soft);
      color: var(--primary);
      font-weight: 900;
    }

    .step-item p {
      margin-bottom: 0;
      font-size: 0.95rem;
    }

    .ranking-card {
      padding: 28px;
      background:
        radial-gradient(circle at 100% 0%, rgba(56, 189, 248, 0.14), transparent 30%),
        #fff;
    }

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

    .rank-item {
      display: grid;
      grid-template-columns: 38px minmax(0, 1fr) auto;
      gap: 12px;
      align-items: center;
      padding: 14px;
      border-radius: 18px;
      border: 1px solid var(--line);
      background: #fff;
      transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
    }

    .rank-item:hover {
      transform: translateY(-2px);
      border-color: rgba(37, 99, 235, 0.22);
      box-shadow: var(--shadow-sm);
    }

    .rank-no {
      width: 38px;
      height: 38px;
      display: grid;
      place-items: center;
      border-radius: 13px;
      background: var(--primary-soft);
      color: var(--primary);
      font-weight: 900;
    }

    .rank-title {
      font-weight: 800;
      color: var(--text);
      line-height: 1.35;
    }

    .rank-sub {
      color: var(--text-muted);
      font-size: 0.86rem;
      font-weight: 650;
    }

    .trend {
      color: var(--success);
      font-weight: 900;
      font-size: 0.9rem;
    }

    .faq-shell {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-md);
      padding: 10px;
    }

    .accordion {
      background: transparent;
      margin: 0;
    }

    .accordion-item {
      border-radius: 20px;
      overflow: hidden;
      border: 1px solid transparent;
      margin-bottom: 8px;
      background: #fff;
    }

    .accordion-item:last-child {
      margin-bottom: 0;
    }

    .accordion-title {
      border: 0;
      padding: 21px 54px 21px 22px;
      color: var(--text);
      font-size: 1.02rem;
      font-weight: 850;
      background: #fff;
      position: relative;
    }

    .accordion-title:hover,
    .accordion-title:focus {
      background: var(--primary-faint);
      color: var(--primary);
    }

    .accordion-title::before {
      right: 22px;
      color: var(--primary);
      font-size: 1.25rem;
      margin-top: -0.65rem;
    }

    .accordion-item.is-active {
      border-color: rgba(37, 99, 235, 0.18);
      box-shadow: var(--shadow-sm);
    }

    .accordion-item.is-active .accordion-title {
      background: var(--primary-faint);
      color: var(--primary);
    }

    .accordion-content {
      border: 0;
      padding: 0 22px 22px;
      color: var(--text-soft);
      line-height: 1.8;
      background: var(--primary-faint);
      position: relative;
    }

    .accordion-content::before {
      content: "";
      display: block;
      width: 44px;
      height: 4px;
      border-radius: 999px;
      background: var(--primary);
      margin-bottom: 14px;
    }

    .feedback-section {
      padding-bottom: 96px;
    }

    .feedback-wrap {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 24px;
      align-items: stretch;
    }

    .cta-card {
      padding: 34px;
      color: #fff;
      border-radius: var(--radius-xl);
      background:
        radial-gradient(circle at 90% 15%, rgba(255,255,255,0.28), transparent 28%),
        linear-gradient(135deg, var(--primary), #2F6FEB);
      box-shadow: var(--shadow-lg);
      min-height: 100%;
      overflow: hidden;
      position: relative;
    }

    .cta-card::after {
      content: "";
      position: absolute;
      width: 230px;
      height: 230px;
      border-radius: 50%;
      right: -92px;
      bottom: -98px;
      background: rgba(255,255,255,0.16);
    }

    .cta-card h2,
    .cta-card p {
      color: #fff;
      position: relative;
      z-index: 1;
    }

    .cta-card p {
      color: rgba(255,255,255,0.9);
    }

    .cta-points {
      display: grid;
      gap: 12px;
      margin-top: 24px;
      position: relative;
      z-index: 1;
    }

    .cta-point {
      display: flex;
      gap: 10px;
      align-items: center;
      color: rgba(255,255,255,0.94);
      font-weight: 750;
    }

    .form-card {
      padding: 30px;
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .field {
      display: grid;
      gap: 8px;
    }

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

    .field label {
      font-weight: 800;
      color: var(--text);
      font-size: 0.94rem;
    }

    .field input,
    .field textarea,
    .field select {
      width: 100%;
      min-height: 48px;
      border-radius: 15px;
      border: 1px solid var(--line-strong);
      background: #fff;
      color: var(--text);
      padding: 12px 14px;
      box-shadow: none;
      transition: border-color var(--ease), box-shadow var(--ease), background var(--ease);
      margin: 0;
    }

    .field textarea {
      resize: vertical;
      min-height: 118px;
    }

    .field input:hover,
    .field textarea:hover,
    .field select:hover {
      border-color: rgba(37, 99, 235, 0.34);
    }

    .field input:focus,
    .field textarea:focus,
    .field select:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.10);
      outline: none;
    }

    .check-row {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      color: var(--text-soft);
      font-size: 0.94rem;
      line-height: 1.6;
    }

    .check-row input {
      margin-top: 5px;
    }

    .privacy-hint {
      padding: 13px 15px;
      border-radius: 16px;
      background: var(--primary-faint);
      border: 1px solid rgba(37, 99, 235, 0.12);
      color: var(--text-soft);
      font-size: 0.92rem;
    }

    .form-actions {
      display: flex;
      align-items: center;
      gap: 14px;
      flex-wrap: wrap;
    }

    .submit-state {
      color: var(--success);
      font-weight: 800;
      display: none;
    }

    .submit-state.is-visible {
      display: inline-flex;
    }

    .site-footer {
      background:
        linear-gradient(180deg, #F5F8FF 0%, #FFFFFF 100%);
      border-top: 1px solid var(--line);
      padding: 54px 0 28px;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 30px;
      align-items: start;
      margin-bottom: 36px;
    }

    .footer-desc {
      max-width: 610px;
      margin: 16px 0 0;
      color: var(--text-soft);
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      justify-content: flex-end;
      gap: 10px;
    }

    .footer-links a {
      padding: 9px 12px;
      border-radius: 999px;
      color: var(--text-soft);
      font-weight: 750;
      background: #fff;
      border: 1px solid var(--line);
    }

    .footer-links a:hover {
      color: var(--primary);
      border-color: rgba(37, 99, 235, 0.22);
      background: var(--primary-soft);
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding-top: 24px;
      border-top: 1px solid var(--line);
      color: var(--text-muted);
      font-size: 0.92rem;
      flex-wrap: wrap;
    }

    .footer-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .footer-badges span {
      padding: 6px 10px;
      border-radius: 999px;
      background: var(--primary-soft);
      color: var(--primary);
      font-weight: 800;
      font-size: 0.82rem;
    }

    .mobile-sticky {
      display: none;
      position: fixed;
      left: 14px;
      right: 14px;
      bottom: 14px;
      z-index: 60;
      padding: 10px;
      border-radius: 22px;
      background: rgba(255,255,255,0.96);
      border: 1px solid var(--line);
      box-shadow: var(--shadow-lg);
      gap: 10px;
    }

    .mobile-sticky .btn {
      flex: 1;
      min-height: 44px;
      padding: 11px 12px;
      font-size: 0.92rem;
    }

    @media (max-width: 1024px) {
      .section {
        padding: 68px 0;
      }

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

      .news-layout,
      .service-matrix,
      .access-board,
      .feedback-wrap,
      .footer-top {
        grid-template-columns: 1fr;
      }

      .recommend-card {
        position: static;
      }

      .footer-links {
        justify-content: flex-start;
      }
    }

    @media (max-width: 768px) {
      .nav-wrap {
        min-height: 68px;
      }

      .title-bar {
        display: block;
        margin-left: auto;
      }

      .nav-menu {
        display: none;
        position: absolute;
        top: 78px;
        left: 16px;
        right: 16px;
        padding: 14px;
        background: #fff;
        border: 1px solid var(--line);
        border-radius: 22px;
        box-shadow: var(--shadow-lg);
        flex-direction: column;
        align-items: stretch;
      }

      .nav-menu.is-open,
      .nav-menu[style*="display: block"] {
        display: flex !important;
      }

      .nav-menu .menu {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
      }

      .nav-menu .menu li,
      .nav-menu .menu a,
      .nav-cta {
        width: 100%;
        text-align: center;
      }

      .profile-stage,
      .hero-inner {
        min-height: auto;
      }

      .floating-follow {
        position: static;
        width: fit-content;
        margin: 22px 0 0 28px;
      }

      .hero-inner {
        padding-top: 28px;
      }

      .section-head {
        display: block;
      }

      .section-head .lead {
        margin-top: 8px;
      }

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

      .arrow-link {
        width: 100%;
        height: 44px;
      }

      .service-tiles,
      .compare-grid,
      .form-grid {
        grid-template-columns: 1fr;
      }

      .mobile-sticky {
        display: flex;
      }

      .feedback-section {
        padding-bottom: 118px;
      }
    }

    @media (max-width: 520px) {
      body {
        font-size: 15px;
      }

      .hero {
        padding-top: 22px;
      }

      .section {
        padding: 56px 0;
      }

      .profile-row {
        align-items: flex-start;
      }

      .avatar {
        width: 68px;
        height: 68px;
        border-radius: 22px;
      }

      .hero-actions {
        display: grid;
      }

      .hero-actions .btn {
        width: 100%;
      }

      .badge-strip,
      .kpi-grid {
        grid-template-columns: 1fr;
      }

      .data-badge {
        min-height: auto;
      }

      .about-panel,
      .service-feature,
      .recommend-card,
      .ranking-card,
      .access-card,
      .form-card,
      .cta-card {
        padding: 22px;
      }

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

/* roulang page: article */
:root {
      --primary: #2563EB;
      --primary-strong: #1D4ED8;
      --primary-soft: #EEF4FF;
      --primary-faint: #F6F9FF;
      --accent: #38BDF8;
      --violet: #7C3AED;
      --warning: #F59E0B;
      --success: #10B981;
      --text: #111827;
      --text-soft: #5B6472;
      --text-muted: #8A94A6;
      --bg: #F6F8FC;
      --white: #FFFFFF;
      --line: #E4EAF3;
      --line-strong: #D7E0EE;
      --shadow-sm: 0 8px 24px rgba(30, 64, 175, 0.06);
      --shadow-md: 0 12px 36px rgba(30, 64, 175, 0.08);
      --shadow-lg: 0 22px 56px rgba(30, 64, 175, 0.12);
      --radius-sm: 12px;
      --radius-md: 18px;
      --radius-lg: 24px;
      --radius-xl: 32px;
      --container: 1200px;
      --ease: 180ms ease;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      text-size-adjust: 100%;
    }

    body {
      margin: 0;
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
      color: var(--text);
      background:
        radial-gradient(circle at 12% 4%, rgba(37, 99, 235, 0.10), transparent 30%),
        radial-gradient(circle at 92% 12%, rgba(56, 189, 248, 0.16), transparent 28%),
        linear-gradient(180deg, #FFFFFF 0%, var(--bg) 42%, #FFFFFF 100%);
      line-height: 1.75;
      font-size: 16px;
      overflow-x: hidden;
    }

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

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

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

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

    button,
    .button {
      cursor: pointer;
    }

    input:focus,
    textarea:focus,
    select:focus,
    button:focus,
    a:focus {
      outline: 3px solid rgba(37, 99, 235, 0.20);
      outline-offset: 3px;
    }

    ::selection {
      color: #fff;
      background: var(--primary);
    }

    .grid-container {
      max-width: var(--container);
    }

    .section {
      padding: 82px 0;
      position: relative;
    }

    .section-tight {
      padding: 58px 0;
    }

    .section-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 28px;
      margin-bottom: 34px;
    }

    .section-head .lead {
      max-width: 680px;
      margin-bottom: 0;
      font-size: 1.03rem;
      color: var(--text-soft);
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border-radius: 999px;
      color: var(--primary);
      background: var(--primary-soft);
      border: 1px solid rgba(37, 99, 235, 0.12);
      font-size: 0.9rem;
      font-weight: 700;
      margin-bottom: 14px;
    }

    .eyebrow .dot {
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: var(--success);
      box-shadow: 0 0 0 5px rgba(16, 185, 129, 0.12);
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255, 255, 255, 0.94);
      border-bottom: 1px solid rgba(228, 234, 243, 0.86);
      box-shadow: 0 10px 30px rgba(17, 24, 39, 0.035);
      backdrop-filter: blur(10px);
    }

    .nav-wrap {
      min-height: 74px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 22px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 850;
      color: var(--text);
      letter-spacing: -0.02em;
      white-space: nowrap;
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      color: #fff;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      box-shadow: 0 12px 24px rgba(37, 99, 235, 0.22);
      position: relative;
      overflow: hidden;
      font-size: 0.88rem;
    }

    .brand-mark::after {
      content: "";
      position: absolute;
      width: 18px;
      height: 18px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.26);
      right: -4px;
      top: -4px;
    }

    .brand-name {
      font-size: 1.08rem;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 18px;
      margin-left: auto;
    }

    .nav-menu .menu {
      gap: 8px;
      align-items: center;
      background: transparent;
    }

    .nav-menu .menu a {
      padding: 10px 16px;
      border-radius: 999px;
      color: var(--text-soft);
      font-weight: 700;
      font-size: 0.95rem;
    }

    .nav-menu .menu a:hover,
    .nav-menu .menu a.active {
      background: var(--primary-soft);
      color: var(--primary);
    }

    .title-bar {
      display: none;
      background: transparent;
      padding: 0;
    }

    .menu-icon {
      width: 42px;
      height: 42px;
      border-radius: 13px;
      background: var(--primary-soft);
      border: 1px solid rgba(37, 99, 235, 0.12);
      color: var(--primary);
    }

    .menu-icon::after {
      background: var(--primary);
      box-shadow: 0 7px 0 var(--primary), 0 14px 0 var(--primary);
      left: 11px;
      width: 20px;
    }

    .nav-cta,
    .btn,
    .button.btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      border: 0;
      border-radius: 999px;
      padding: 13px 20px;
      min-height: 48px;
      font-weight: 800;
      line-height: 1;
      transition: transform var(--ease), box-shadow var(--ease), background var(--ease), border-color var(--ease), color var(--ease);
      margin: 0;
    }

    .nav-cta,
    .btn-primary {
      color: #fff;
      background: linear-gradient(135deg, var(--primary), #2F6FEB);
      box-shadow: 0 14px 28px rgba(37, 99, 235, 0.22);
    }

    .nav-cta:hover,
    .btn-primary:hover {
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 18px 36px rgba(37, 99, 235, 0.28);
      background: linear-gradient(135deg, var(--primary-strong), var(--primary));
    }

    .btn-secondary {
      color: var(--primary);
      background: #fff;
      border: 1px solid rgba(37, 99, 235, 0.20);
      box-shadow: var(--shadow-sm);
    }

    .btn-secondary:hover {
      transform: translateY(-2px);
      color: var(--primary-strong);
      background: var(--primary-soft);
      box-shadow: var(--shadow-md);
    }

    .btn-ghost {
      color: var(--text-soft);
      background: rgba(255, 255, 255, 0.72);
      border: 1px solid var(--line);
    }

    .btn-ghost:hover {
      color: var(--primary);
      background: var(--primary-faint);
      border-color: rgba(37, 99, 235, 0.18);
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 7px 11px;
      border-radius: 999px;
      background: var(--primary-faint);
      border: 1px solid rgba(37, 99, 235, 0.12);
      color: var(--primary);
      font-size: 0.86rem;
      font-weight: 800;
    }

    .badge.warning {
      color: #A16207;
      background: #FFF7E8;
      border-color: rgba(245, 158, 11, 0.20);
    }

    .badge.muted {
      color: var(--text-soft);
      background: #fff;
      border-color: var(--line);
    }

    .card {
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
    }

    .card:hover {
      transform: translateY(-3px);
      border-color: rgba(37, 99, 235, 0.22);
      box-shadow: var(--shadow-lg);
    }

    .article-hero {
      padding: 58px 0 42px;
      position: relative;
      overflow: hidden;
    }

    .article-hero::before {
      content: "";
      position: absolute;
      width: 520px;
      height: 520px;
      border-radius: 999px;
      background: radial-gradient(circle, rgba(37, 99, 235, 0.12), transparent 66%);
      left: -220px;
      top: -180px;
      pointer-events: none;
    }

    .article-hero::after {
      content: "";
      position: absolute;
      width: 360px;
      height: 360px;
      border-radius: 999px;
      background: radial-gradient(circle, rgba(56, 189, 248, 0.16), transparent 64%);
      right: -160px;
      bottom: -160px;
      pointer-events: none;
    }

    .breadcrumb-line {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 10px;
      color: var(--text-muted);
      font-size: 0.94rem;
      margin-bottom: 22px;
    }

    .breadcrumb-line a {
      color: var(--text-soft);
      font-weight: 700;
    }

    .breadcrumb-line a:hover {
      color: var(--primary);
    }

    .breadcrumb-line i {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    .article-kv {
      align-items: stretch;
      position: relative;
      z-index: 1;
    }

    .article-title-card {
      padding: 34px;
      border-radius: var(--radius-xl);
      background: rgba(255, 255, 255, 0.90);
      border: 1px solid rgba(228, 234, 243, 0.94);
      box-shadow: var(--shadow-lg);
      min-height: 100%;
    }

    .article-title-card h1 {
      margin: 0 0 18px;
      font-size: clamp(2rem, 4vw, 3.25rem);
      line-height: 1.18;
      font-weight: 850;
      letter-spacing: -0.04em;
      color: var(--text);
    }

    .article-summary {
      margin: 0 0 22px;
      color: var(--text-soft);
      font-size: 1.08rem;
      line-height: 1.85;
      max-width: 760px;
    }

    .meta-row {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin: 20px 0 0;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 28px;
    }

    .warmup-panel {
      padding: 26px;
      position: relative;
      overflow: hidden;
    }

    .warmup-panel::before {
      content: "";
      position: absolute;
      inset: 0;
      background:
        linear-gradient(135deg, rgba(37, 99, 235, 0.08), transparent 45%),
        radial-gradient(circle at 80% 12%, rgba(56, 189, 248, 0.20), transparent 34%);
      pointer-events: none;
    }

    .warmup-inner {
      position: relative;
      z-index: 1;
    }

    .progress-ring-wrap {
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 10px 0 24px;
    }

    .progress-ring {
      width: 172px;
      height: 172px;
      border-radius: 50%;
      background:
        conic-gradient(var(--primary) 0 302deg, #EAF0FA 302deg 360deg);
      display: grid;
      place-items: center;
      box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.08), 0 18px 40px rgba(37, 99, 235, 0.12);
      position: relative;
    }

    .progress-ring::after {
      content: "";
      position: absolute;
      width: 128px;
      height: 128px;
      border-radius: 999px;
      background: #fff;
      box-shadow: inset 0 0 0 1px var(--line);
    }

    .progress-value {
      position: relative;
      z-index: 1;
      text-align: center;
    }

    .progress-value strong {
      display: block;
      font-size: 2.18rem;
      line-height: 1;
      color: var(--primary);
      font-weight: 900;
      letter-spacing: -0.04em;
    }

    .progress-value span {
      display: block;
      margin-top: 8px;
      font-size: 0.86rem;
      color: var(--text-soft);
      font-weight: 800;
    }

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

    .tier-list li {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      padding: 13px 14px;
      border-radius: 16px;
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow-sm);
    }

    .tier-list b {
      display: block;
      font-size: 0.98rem;
      color: var(--text);
    }

    .tier-list small {
      color: var(--text-muted);
      font-weight: 700;
    }

    .tier-status {
      flex: 0 0 auto;
      width: 10px;
      height: 10px;
      border-radius: 999px;
      background: var(--success);
      box-shadow: 0 0 0 5px rgba(16, 185, 129, 0.12);
    }

    .hero-note {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      margin-top: 16px;
      padding: 13px 14px;
      border-radius: 16px;
      background: #FFF8EA;
      border: 1px solid rgba(245, 158, 11, 0.18);
      color: #8A5A00;
      font-size: 0.94rem;
      line-height: 1.65;
    }

    .article-shell {
      padding-top: 34px;
    }

    .article-layout {
      align-items: flex-start;
    }

    .article-main {
      padding: 34px;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-md);
    }

    .article-content {
      font-size: 1.06rem;
      color: #1F2937;
      line-height: 1.9;
    }

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

    .article-content h2,
    .article-content h3,
    .article-content h4 {
      color: var(--text);
      font-weight: 850;
      line-height: 1.35;
      letter-spacing: -0.02em;
    }

    .article-content h2 {
      font-size: 1.78rem;
      margin: 2.1em 0 0.72em;
      padding-top: 8px;
      position: relative;
    }

    .article-content h2::before {
      content: "";
      display: block;
      width: 42px;
      height: 4px;
      border-radius: 999px;
      background: linear-gradient(90deg, var(--primary), var(--accent));
      margin-bottom: 12px;
    }

    .article-content h3 {
      font-size: 1.36rem;
      margin: 1.8em 0 0.65em;
    }

    .article-content h4 {
      font-size: 1.12rem;
      margin: 1.5em 0 0.55em;
    }

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

    .article-content a {
      color: var(--primary);
      font-weight: 800;
      border-bottom: 1px solid rgba(37, 99, 235, 0.22);
    }

    .article-content a:hover {
      color: var(--primary-strong);
      border-color: var(--primary);
    }

    .article-content ul,
    .article-content ol {
      margin: 0 0 1.25em 1.25em;
      padding-left: 1.05em;
    }

    .article-content li {
      margin: 0.45em 0;
      padding-left: 0.1em;
    }

    .article-content blockquote {
      margin: 1.5em 0;
      padding: 18px 20px 18px 22px;
      border-left: 5px solid var(--primary);
      border-radius: 0 var(--radius-md) var(--radius-md) 0;
      background: var(--primary-faint);
      color: var(--text-soft);
      font-weight: 700;
    }

    .article-content figure {
      margin: 1.6em 0;
      padding: 12px;
      border-radius: var(--radius-lg);
      background: var(--primary-faint);
      border: 1px solid var(--line);
    }

    .article-content figcaption {
      margin-top: 10px;
      color: var(--text-muted);
      font-size: 0.92rem;
      text-align: center;
    }

    .article-content img {
      border-radius: var(--radius-md);
      border: 1px solid var(--line);
      background: #fff;
    }

    .article-content table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      margin: 1.5em 0;
      overflow: hidden;
      border: 1px solid var(--line);
      border-radius: var(--radius-md);
      display: block;
      max-width: 100%;
      overflow-x: auto;
      background: #fff;
    }

    .article-content th,
    .article-content td {
      padding: 13px 15px;
      border-bottom: 1px solid var(--line);
      min-width: 130px;
    }

    .article-content th {
      color: var(--text);
      background: var(--primary-faint);
      font-weight: 850;
    }

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

    .article-content code {
      padding: 2px 7px;
      border-radius: 8px;
      background: #F1F5F9;
      color: #334155;
      font-size: 0.94em;
    }

    .article-content pre {
      padding: 18px;
      border-radius: var(--radius-md);
      background: #0F172A;
      color: #E5E7EB;
      overflow-x: auto;
      line-height: 1.7;
      box-shadow: var(--shadow-sm);
    }

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

    .empty-content {
      text-align: center;
      padding: 58px 24px;
      background:
        radial-gradient(circle at 50% 0%, rgba(37, 99, 235, 0.10), transparent 42%),
        #fff;
      border: 1px dashed rgba(37, 99, 235, 0.28);
      border-radius: var(--radius-lg);
    }

    .empty-icon {
      width: 74px;
      height: 74px;
      margin: 0 auto 18px;
      border-radius: 26px;
      display: grid;
      place-items: center;
      color: var(--primary);
      background: var(--primary-soft);
      font-size: 1.8rem;
    }

    .empty-content h2 {
      margin: 0 0 10px;
      font-size: 1.55rem;
      font-weight: 850;
    }

    .empty-content p {
      max-width: 520px;
      margin: 0 auto 24px;
      color: var(--text-soft);
    }

    .article-footer-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      padding-top: 28px;
      margin-top: 28px;
      border-top: 1px solid var(--line);
    }

    .article-side {
      position: sticky;
      top: 96px;
      display: grid;
      gap: 18px;
    }

    .side-card {
      padding: 22px;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
    }

    .side-card h2,
    .side-card h3 {
      margin: 0 0 14px;
      font-size: 1.08rem;
      line-height: 1.35;
      font-weight: 850;
      color: var(--text);
    }

    .side-card p {
      margin: 0;
      color: var(--text-soft);
      font-size: 0.96rem;
      line-height: 1.7;
    }

    .info-stack {
      display: grid;
      gap: 10px;
      margin-top: 16px;
    }

    .info-item {
      display: flex;
      align-items: center;
      gap: 11px;
      padding: 12px;
      border-radius: 15px;
      background: var(--primary-faint);
      border: 1px solid rgba(37, 99, 235, 0.10);
      color: var(--text-soft);
      font-weight: 750;
      font-size: 0.94rem;
    }

    .info-item i {
      width: 28px;
      height: 28px;
      border-radius: 10px;
      display: grid;
      place-items: center;
      color: var(--primary);
      background: #fff;
      box-shadow: var(--shadow-sm);
    }

    .safety-list {
      margin: 14px 0 0;
      padding: 0;
      list-style: none;
      display: grid;
      gap: 10px;
    }

    .safety-list li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      color: var(--text-soft);
      font-size: 0.95rem;
    }

    .safety-list i {
      color: var(--success);
      margin-top: 5px;
    }

    .related-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 18px;
    }

    .related-card {
      padding: 24px;
      min-height: 100%;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .related-card h3 {
      margin: 0;
      font-size: 1.24rem;
      line-height: 1.35;
      font-weight: 850;
    }

    .related-card p {
      margin: 0;
      color: var(--text-soft);
      line-height: 1.7;
    }

    .related-card .arrow {
      margin-top: auto;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--primary);
      font-weight: 850;
    }

    .related-card:hover .arrow i {
      transform: translateX(4px);
    }

    .arrow i {
      transition: transform var(--ease);
    }

    .faq-wrap {
      background: #fff;
      border-radius: var(--radius-xl);
      border: 1px solid var(--line);
      box-shadow: var(--shadow-md);
      overflow: hidden;
    }

    .accordion {
      margin: 0;
      background: transparent;
    }

    .accordion-item {
      border-bottom: 1px solid var(--line);
    }

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

    .accordion-title {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      padding: 22px 24px;
      border: 0;
      color: var(--text);
      font-weight: 850;
      font-size: 1.03rem;
      line-height: 1.45;
      background: #fff;
    }

    .accordion-title::before {
      content: "\2b";
      right: 24px;
      margin-top: -0.68rem;
      color: var(--primary);
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      transition: transform var(--ease);
    }

    .is-active > .accordion-title {
      background: var(--primary-faint);
      color: var(--primary);
    }

    .is-active > .accordion-title::before {
      content: "\f068";
      transform: rotate(180deg);
    }

    .accordion-title:hover,
    .accordion-title:focus {
      background: var(--primary-faint);
      color: var(--primary);
    }

    .accordion-content {
      padding: 0 24px 22px 24px;
      border: 0;
      background: var(--primary-faint);
      color: var(--text-soft);
      line-height: 1.75;
    }

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

    .support-panel {
      padding: 30px;
      border-radius: var(--radius-xl);
      border: 1px solid rgba(37, 99, 235, 0.13);
      background:
        linear-gradient(135deg, rgba(238, 244, 255, 0.92), rgba(255, 255, 255, 0.96)),
        radial-gradient(circle at 90% 12%, rgba(56, 189, 248, 0.18), transparent 34%);
      box-shadow: var(--shadow-md);
    }

    .support-list {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-top: 22px;
    }

    .support-item {
      padding: 20px;
      border-radius: var(--radius-lg);
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow-sm);
    }

    .support-item i {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      margin-bottom: 15px;
      color: var(--primary);
      background: var(--primary-soft);
      font-size: 1.08rem;
    }

    .support-item h3 {
      margin: 0 0 8px;
      font-size: 1.08rem;
      font-weight: 850;
    }

    .support-item p {
      margin: 0;
      color: var(--text-soft);
      font-size: 0.96rem;
      line-height: 1.7;
    }

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

    .feedback-card {
      overflow: hidden;
      border-radius: var(--radius-xl);
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow-lg);
    }

    .feedback-copy {
      padding: 34px;
      min-height: 100%;
      background:
        radial-gradient(circle at 10% 8%, rgba(56, 189, 248, 0.24), transparent 34%),
        linear-gradient(135deg, #2563EB, #2F6FEB);
      color: #fff;
      position: relative;
    }

    .feedback-copy h2 {
      margin: 0 0 14px;
      font-size: clamp(1.7rem, 3vw, 2.35rem);
      line-height: 1.25;
      font-weight: 900;
      letter-spacing: -0.03em;
    }

    .feedback-copy p {
      margin: 0 0 22px;
      color: rgba(255, 255, 255, 0.84);
      line-height: 1.75;
    }

    .feedback-points {
      display: grid;
      gap: 12px;
      margin: 24px 0 0;
      padding: 0;
      list-style: none;
    }

    .feedback-points li {
      display: flex;
      align-items: center;
      gap: 10px;
      color: rgba(255, 255, 255, 0.92);
      font-weight: 750;
    }

    .feedback-points i {
      width: 28px;
      height: 28px;
      border-radius: 999px;
      display: grid;
      place-items: center;
      color: #fff;
      background: rgba(255, 255, 255, 0.16);
    }

    .feedback-form {
      padding: 34px;
    }

    .feedback-form label {
      color: var(--text);
      font-weight: 850;
      margin-bottom: 14px;
    }

    .feedback-form input,
    .feedback-form select,
    .feedback-form textarea {
      height: auto;
      min-height: 50px;
      border-radius: 15px;
      border: 1px solid var(--line-strong);
      box-shadow: none;
      background: #fff;
      color: var(--text);
      padding: 13px 14px;
      margin-top: 7px;
      transition: border-color var(--ease), box-shadow var(--ease), background var(--ease);
    }

    .feedback-form textarea {
      min-height: 118px;
      resize: vertical;
    }

    .feedback-form input:focus,
    .feedback-form select:focus,
    .feedback-form textarea:focus {
      border-color: rgba(37, 99, 235, 0.55);
      box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.10);
      background: var(--primary-faint);
    }

    .check-row {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      margin: 4px 0 18px;
      color: var(--text-soft);
      font-size: 0.94rem;
      line-height: 1.6;
    }

    .check-row input {
      min-height: auto;
      width: 18px;
      height: 18px;
      margin: 4px 0 0;
      flex: 0 0 auto;
    }

    .form-tip {
      margin-top: 12px;
      color: var(--text-muted);
      font-size: 0.9rem;
      line-height: 1.6;
    }

    .site-footer {
      padding: 52px 0 30px;
      background:
        linear-gradient(180deg, rgba(238, 244, 255, 0.72), #fff);
      border-top: 1px solid var(--line);
    }

    .footer-top {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      gap: 34px;
      padding-bottom: 30px;
      border-bottom: 1px solid var(--line);
    }

    .footer-desc {
      max-width: 520px;
      margin: 16px 0 0;
      color: var(--text-soft);
      line-height: 1.75;
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      justify-content: flex-end;
      gap: 10px;
      max-width: 430px;
    }

    .footer-links a {
      padding: 9px 13px;
      border-radius: 999px;
      color: var(--text-soft);
      background: #fff;
      border: 1px solid var(--line);
      font-weight: 750;
      font-size: 0.94rem;
    }

    .footer-links a:hover {
      color: var(--primary);
      background: var(--primary-soft);
      border-color: rgba(37, 99, 235, 0.18);
      transform: translateY(-2px);
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      padding-top: 24px;
      color: var(--text-muted);
      font-size: 0.94rem;
    }

    .footer-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      justify-content: flex-end;
    }

    .footer-badges span {
      padding: 7px 10px;
      border-radius: 999px;
      color: var(--text-soft);
      background: var(--primary-faint);
      border: 1px solid rgba(37, 99, 235, 0.10);
      font-weight: 750;
    }

    @media screen and (max-width: 1024px) {
      .article-side {
        position: static;
        margin-top: 24px;
      }

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

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

      .section {
        padding: 68px 0;
      }
    }

    @media screen and (max-width: 768px) {
      .nav-wrap {
        min-height: 66px;
        flex-wrap: wrap;
        align-items: center;
        padding-top: 12px;
        padding-bottom: 12px;
      }

      .title-bar {
        display: block;
        margin-left: auto;
      }

      .nav-menu {
        width: 100%;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
        padding: 14px;
        margin-left: 0;
        background: #fff;
        border: 1px solid var(--line);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-md);
      }

      .nav-menu.is-active {
        display: flex;
      }

      .nav-menu .menu {
        width: 100%;
        display: grid;
        gap: 8px;
      }

      .nav-menu .menu a {
        display: block;
        width: 100%;
      }

      .nav-cta {
        width: 100%;
      }

      .article-hero {
        padding: 34px 0 26px;
      }

      .article-title-card,
      .article-main,
      .feedback-copy,
      .feedback-form {
        padding: 24px;
      }

      .warmup-panel {
        margin-top: 18px;
      }

      .section-head {
        display: block;
      }

      .section-head .lead {
        margin-top: 10px;
      }

      .support-list {
        grid-template-columns: 1fr;
      }

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

      .footer-links,
      .footer-badges {
        justify-content: flex-start;
      }
    }

    @media screen and (max-width: 520px) {
      body {
        font-size: 15px;
      }

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

      .brand-name {
        font-size: 1rem;
      }

      .article-title-card h1 {
        font-size: 2rem;
      }

      .hero-actions,
      .article-footer-actions {
        flex-direction: column;
      }

      .hero-actions .btn,
      .article-footer-actions .btn {
        width: 100%;
      }

      .meta-row {
        gap: 8px;
      }

      .badge {
        font-size: 0.82rem;
      }

      .progress-ring {
        width: 150px;
        height: 150px;
      }

      .progress-ring::after {
        width: 112px;
        height: 112px;
      }

      .progress-value strong {
        font-size: 1.86rem;
      }

      .article-main {
        padding: 20px;
        border-radius: var(--radius-lg);
      }

      .article-content h2 {
        font-size: 1.45rem;
      }

      .article-content h3 {
        font-size: 1.2rem;
      }

      .accordion-title {
        padding: 18px 20px;
        padding-right: 46px;
      }

      .accordion-title::before {
        right: 18px;
      }

      .accordion-content {
        padding: 0 20px 20px;
      }
    }