/* ============ 基础重置 ============ */
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
  body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
    background: #FFFFFF;
    color: #1C1C1E;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
  }
  a { color: inherit; text-decoration: none; }
  ::selection { background: rgba(122, 92, 255, 0.18); }

  /* ============ 强调色变量 ============ */
  :root {
    --accent-start: #7A5CFF;
    --accent-end: #00D2FF;
    --accent-grad: linear-gradient(135deg, #7A5CFF 0%, #00D2FF 100%);
    --text-primary: #1C1C1E;
    --text-secondary: #3A3A3C;
    --text-tertiary: #6E6E73;
    --bg-base: #FFFFFF;
    --bg-soft: #F5F5F7;
    --border-soft: rgba(0, 0, 0, 0.06);
    --glass-bg: rgba(255, 255, 255, 0.55);
    --glass-bg-strong: rgba(255, 255, 255, 0.72);
  }

  /* ============ 背景光晕 ============ */
  .bg-aurora {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
    background: #FFFFFF;
  }
  .bg-aurora::before,
  .bg-aurora::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.35;
  }
  .bg-aurora::before {
    width: 60vw; height: 60vw;
    top: -20vw; left: -10vw;
    background: radial-gradient(circle, rgba(122, 92, 255, 0.45), transparent 60%);
  }
  .bg-aurora::after {
    width: 55vw; height: 55vw;
    top: 10vh; right: -15vw;
    background: radial-gradient(circle, rgba(0, 210, 255, 0.38), transparent 60%);
  }
  .bg-aurora .blob3 {
    position: absolute;
    width: 50vw; height: 50vw;
    bottom: -15vw; left: 30vw;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(122, 92, 255, 0.22), transparent 60%);
    filter: blur(130px);
    opacity: 0.5;
  }

  /* ============ 导航栏 ============ */
  .nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 24px;
    background: rgba(255, 255, 255, 0.5);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid transparent;
    transition: background 0.35s ease, border-color 0.35s ease, backdrop-filter 0.35s ease;
  }
  .nav.scrolled {
    background: rgba(255, 255, 255, 0.82);
    border-bottom-color: var(--border-soft);
  }
  .nav-inner {
    width: 100%;
    max-width: 1120px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }
  .logo {
    font-size: 19px;
    font-weight: 600;
    letter-spacing: -0.01em;
    display: flex;
    align-items: baseline;
    gap: 1px;
  }
  .logo .plus {
    background: var(--accent-grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
  }
  .nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    flex: 1;
    justify-content: center;
  }
  .nav-links a {
    font-size: 14px;
    color: var(--text-secondary);
    transition: color 0.2s ease;
  }
  .nav-links a:hover { color: var(--text-primary); }
  .nav-actions {
    display: flex;
    align-items: center;
    gap: 14px;
  }
  .nav-actions .docs-link {
    font-size: 14px;
    color: var(--text-secondary);
    transition: color 0.2s ease;
  }
  .nav-actions .docs-link:hover { color: var(--text-primary); }
  .btn-download {
    font-size: 14px;
    font-weight: 500;
    color: #FFFFFF;
    padding: 7px 16px;
    border-radius: 980px;
    background: var(--accent-grad);
    box-shadow: 0 4px 14px rgba(122, 92, 255, 0.28);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
  }
  .btn-download:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 22px rgba(122, 92, 255, 0.4);
  }

  /* ============ 通用容器 ============ */
  .container {
    width: 100%;
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
  }
  section { position: relative; }

  /* ============ Hero ============ */
  .hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 24px 80px;
  }
  .hero-inner { max-width: 880px; }
  .hero-tags {
    display: inline-flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-bottom: 28px;
  }
  .pill {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: 980px;
    background: var(--glass-bg);
    border: 1px solid var(--border-soft);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    letter-spacing: 0.02em;
  }
  .pill.version {
    color: var(--text-tertiary);
    font-family: "SF Mono", ui-monospace, "JetBrains Mono", monospace;
  }
  .hero h1 {
    font-size: clamp(40px, 7vw, 76px);
    font-weight: 700;
    letter-spacing: -0.035em;
    line-height: 1.05;
    margin-bottom: 24px;
  }
  .hero h1 .accent {
    background: var(--accent-grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  .hero p.lead {
    font-size: clamp(17px, 2vw, 21px);
    color: var(--text-secondary);
    line-height: 1.55;
    max-width: 720px;
    margin: 0 auto 36px;
    font-weight: 400;
  }
  .hero-cta {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
  }
  .btn-primary {
    font-size: 15px;
    font-weight: 500;
    color: #FFFFFF;
    padding: 12px 26px;
    border-radius: 980px;
    background: var(--accent-grad);
    box-shadow: 0 6px 20px rgba(122, 92, 255, 0.3);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
  }
  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(122, 92, 255, 0.42);
  }
  .btn-ghost {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
    padding: 12px 26px;
    border-radius: 980px;
    background: var(--glass-bg);
    border: 1px solid var(--border-soft);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    transition: background 0.25s ease, transform 0.25s ease;
  }
  .btn-ghost:hover {
    background: var(--glass-bg-strong);
    transform: translateY(-2px);
  }

  /* ============ 引言区 ============ */
  .intro {
    padding: 100px 24px;
    text-align: center;
  }
  .intro blockquote {
    max-width: 820px;
    margin: 0 auto;
    font-size: clamp(24px, 3.4vw, 38px);
    font-weight: 600;
    line-height: 1.35;
    letter-spacing: -0.02em;
    color: var(--text-primary);
  }
  .intro .attribution {
    margin-top: 24px;
    font-size: 15px;
    color: var(--text-tertiary);
    letter-spacing: 0.01em;
  }
  .intro .attribution::before {
    content: "— ";
    color: var(--text-tertiary);
  }
  .divider-line {
    width: 48px;
    height: 2px;
    background: var(--accent-grad);
    border-radius: 2px;
    margin: 64px auto 0;
    opacity: 0.6;
  }

  /* ============ 区块标题 ============ */
  .section-head {
    text-align: center;
    margin-bottom: 64px;
  }
  .section-eyebrow {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    background: var(--accent-grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 14px;
  }
  .section-title {
    font-size: clamp(30px, 4.5vw, 50px);
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.1;
    color: var(--text-primary);
  }
  .section-sub {
    margin-top: 16px;
    font-size: 17px;
    color: var(--text-tertiary);
    max-width: 580px;
    margin-left: auto;
    margin-right: auto;
  }

  /* ============ 功能展示区 ============ */
  .features { padding: 80px 24px 120px; }
  .feature-list {
    display: flex;
    flex-direction: column;
    gap: 28px;
    max-width: 1040px;
    margin: 0 auto;
  }
  .feature {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    padding: 44px 48px;
    border-radius: 28px;
    background: var(--glass-bg);
    border: 1px solid var(--border-soft);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
  }
  .feature:hover {
    transform: translateY(-3px);
    border-color: rgba(122, 92, 255, 0.22);
    box-shadow: 0 20px 50px rgba(122, 92, 255, 0.08);
  }
  /* 非对称错落 */
  .feature:nth-child(odd) .feature-text { order: 1; }
  .feature:nth-child(odd) .feature-visual { order: 2; }
  .feature:nth-child(even) .feature-text { order: 2; }
  .feature:nth-child(even) .feature-visual { order: 1; }

  .feature-icon {
    width: 48px; height: 48px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-grad);
    color: #FFFFFF;
    margin-bottom: 22px;
    box-shadow: 0 8px 20px rgba(122, 92, 255, 0.25);
  }
  .feature-icon svg { width: 24px; height: 24px; }
  .feature h3 {
    font-size: 26px;
    font-weight: 600;
    letter-spacing: -0.015em;
    margin-bottom: 14px;
    color: var(--text-primary);
  }
  .feature p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
  }
  .feature-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }
  .tag {
    font-size: 12px;
    font-family: "SF Mono", ui-monospace, "JetBrains Mono", monospace;
    color: var(--text-tertiary);
    padding: 5px 11px;
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.035);
    border: 1px solid var(--border-soft);
    letter-spacing: 0.01em;
  }
  .tag-label {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-right: 6px;
    align-self: center;
    font-weight: 500;
  }
  .feature-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 220px;
    position: relative;
  }
  .visual-card {
    width: 100%;
    border-radius: 22px;
    background: linear-gradient(160deg, rgba(255,255,255,0.85), rgba(245,245,247,0.6));
    border: 1px solid var(--border-soft);
    padding: 28px;
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
  }
  .visual-card::after {
    content: "";
    position: absolute;
    top: -40%; right: -40%;
    width: 80%; height: 80%;
    background: var(--accent-grad);
    filter: blur(60px);
    opacity: 0.12;
    border-radius: 50%;
  }
  .vc-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 13px;
    color: var(--text-secondary);
    font-family: "SF Mono", ui-monospace, "JetBrains Mono", monospace;
    position: relative;
    z-index: 1;
  }
  .vc-row:last-child { margin-bottom: 0; }
  .vc-key {
    color: var(--text-tertiary);
    min-width: 70px;
  }
  .vc-val {
    color: var(--text-primary);
    font-weight: 500;
  }
  .vc-bar {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: rgba(0,0,0,0.06);
    overflow: hidden;
  }
  .vc-bar > span {
    display: block;
    height: 100%;
    border-radius: 3px;
    background: var(--accent-grad);
  }
  .vc-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: #34C759;
    box-shadow: 0 0 0 3px rgba(52, 199, 89, 0.18);
  }

  /* ============ 配置演示区 ============ */
  .config { padding: 100px 24px; }
  .config-card {
    max-width: 880px;
    margin: 0 auto;
    border-radius: 24px;
    background: var(--glass-bg-strong);
    border: 1px solid var(--border-soft);
    -webkit-backdrop-filter: blur(24px);
    backdrop-filter: blur(24px);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.08);
    overflow: hidden;
  }
  .config-head {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-soft);
    background: rgba(255, 255, 255, 0.4);
  }
  .config-dots { display: flex; gap: 8px; }
  .config-dots span {
    width: 12px; height: 12px;
    border-radius: 50%;
    background: rgba(0,0,0,0.12);
  }
  .config-dots span:nth-child(1) { background: #FF5F57; }
  .config-dots span:nth-child(2) { background: #FEBC2E; }
  .config-dots span:nth-child(3) { background: #28C840; }
  .config-file {
    font-size: 13px;
    color: var(--text-tertiary);
    font-family: "SF Mono", ui-monospace, "JetBrains Mono", monospace;
    margin-left: 8px;
  }
  pre.code {
    margin: 0;
    padding: 28px 32px;
    overflow-x: auto;
    font-family: "SF Mono", ui-monospace, "JetBrains Mono", "Cascadia Code", monospace;
    font-size: 13.5px;
    line-height: 1.7;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.35);
  }
  .code .c-comment { color: #8E8E93; font-style: italic; }
  .code .c-section { color: #7A5CFF; font-weight: 600; }
  .code .c-key { color: #1C1C1E; }
  .code .c-string { color: #00A86B; }
  .code .c-bool { color: #B4514B; }
  .code .c-num { color: #C25E00; }

  /* ============ 快速开始 ============ */
  .quickstart { padding: 100px 24px 60px; }
  .steps {
    max-width: 1040px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  .step {
    padding: 36px 32px;
    border-radius: 24px;
    background: var(--glass-bg);
    border: 1px solid var(--border-soft);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    transition: transform 0.35s ease, box-shadow 0.35s ease;
  }
  .step:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 40px rgba(0,0,0,0.06);
  }
  .step-num {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
    background: var(--accent-grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 14px;
  }
  .step h4 {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.015em;
    margin-bottom: 12px;
    color: var(--text-primary);
  }
  .step p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
  }
  .step code {
    font-family: "SF Mono", ui-monospace, "JetBrains Mono", monospace;
    font-size: 13px;
    color: #7A5CFF;
    background: rgba(122,92,255,0.08);
    padding: 2px 6px;
    border-radius: 6px;
  }
  .verify-block {
    max-width: 1040px;
    margin: 32px auto 0;
    padding: 28px 32px;
    border-radius: 20px;
    background: var(--glass-bg-strong);
    border: 1px solid var(--border-soft);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    text-align: left;
  }
  .verify-block .vb-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .verify-block pre {
    font-family: "SF Mono", ui-monospace, "JetBrains Mono", monospace;
    font-size: 13px;
    line-height: 1.8;
    color: var(--text-secondary);
    white-space: pre-wrap;
  }
  .verify-block pre .ok { color: #34C759; }

  /* ============ 架构总览 ============ */
  .architecture { padding: 80px 24px; }
  .arch-grid {
    max-width: 1040px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 28px;
  }
  .arch-diagram {
    padding: 32px;
    border-radius: 24px;
    background: var(--glass-bg);
    border: 1px solid var(--border-soft);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    overflow: hidden;
  }
  .arch-flow {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  .arch-tier { width: 100%; display: flex; flex-direction: column; align-items: center; gap: 12px; }
  .arch-tier-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-tertiary);
  }
  .arch-tier-box {
    width: 100%;
    border: 1.5px dashed rgba(122, 92, 255, 0.35);
    border-radius: 18px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.4);
  }
  .arch-row {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 10px;
  }
  .arch-node {
    flex: 1;
    min-width: 0;
    text-align: center;
    padding: 14px 10px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.75);
    border: 1px solid var(--border-soft);
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 3px;
  }
  .arch-node .n-title { font-size: 13.5px; font-weight: 600; color: var(--text-primary); }
  .arch-node .n-sub { font-size: 11px; color: var(--text-tertiary); font-family: "SF Mono", ui-monospace, monospace; }
  .arch-node.is-core {
    background: var(--accent-grad);
    border-color: transparent;
    box-shadow: 0 8px 20px rgba(122, 92, 255, 0.25);
  }
  .arch-node.is-core .n-title { color: #fff; }
  .arch-node.is-core .n-sub { color: rgba(255, 255, 255, 0.88); }
  .arch-node.is-server {
    background: rgba(122, 92, 255, 0.08);
    border-color: rgba(122, 92, 255, 0.28);
    min-width: 220px;
    padding: 16px 28px;
  }
  .arch-connector {
    width: 2px;
    height: 26px;
    background: var(--accent-grad);
    position: relative;
    flex-shrink: 0;
  }
  .arch-connector::after {
    content: "";
    position: absolute;
    bottom: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 0; height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 7px solid #00D2FF;
  }
  .arch-branch {
    width: 75%;
    height: 30px;
    position: relative;
  }
  .arch-branch::before {
    content: "";
    position: absolute;
    top: 0; left: 50%;
    width: 2px; height: 14px;
    background: var(--accent-grad);
    transform: translateX(-50%);
  }
  .arch-branch::after {
    content: "";
    position: absolute;
    top: 14px;
    left: 16.66%; right: 16.66%;
    height: 2px;
    background: var(--accent-grad);
  }
  .arch-api-grid {
    width: 75%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
  }
  .arch-api-cell { display: flex; flex-direction: column; align-items: center; gap: 0; }
  .arch-api-cell .leg { width: 2px; height: 16px; background: var(--accent-grad); flex-shrink: 0; }
  .arch-modules {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  .module-row {
    padding: 18px 22px;
    border-radius: 16px;
    background: var(--glass-bg);
    border: 1px solid var(--border-soft);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    transition: border-color 0.3s ease, transform 0.3s ease;
  }
  .module-row:hover {
    border-color: rgba(122,92,255,0.25);
    transform: translateX(2px);
  }
  .module-row .m-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 4px;
  }
  .module-row .m-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
  }
  .module-row .m-path {
    font-size: 12px;
    font-family: "SF Mono", ui-monospace, monospace;
    color: var(--text-tertiary);
  }
  .module-row .m-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
  }
  .flow-chain {
    max-width: 1040px;
    margin: 32px auto 0;
    padding: 28px 32px;
    border-radius: 20px;
    background: var(--glass-bg-strong);
    border: 1px solid var(--border-soft);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
  }
  .flow-chain .fc-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 18px;
  }
  .flow-chain ol {
    list-style: none;
    counter-reset: flow;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px 32px;
  }
  .flow-chain li {
    counter-increment: flow;
    font-size: 13.5px;
    color: var(--text-secondary);
    line-height: 1.5;
    padding-left: 30px;
    position: relative;
  }
  .flow-chain li::before {
    content: counter(flow);
    position: absolute;
    left: 0; top: 0;
    width: 20px; height: 20px;
    border-radius: 50%;
    background: var(--accent-grad);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  /* ============ 使用教程 ============ */
  .guide { padding: 80px 24px; }
  .guide-grid {
    max-width: 1040px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .guide-card {
    padding: 30px 32px;
    border-radius: 22px;
    background: var(--glass-bg);
    border: 1px solid var(--border-soft);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    transition: transform 0.35s ease, box-shadow 0.35s ease;
  }
  .guide-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 40px rgba(122,92,255,0.07);
  }
  .guide-card .gc-eyebrow {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-tertiary);
    margin-bottom: 8px;
  }
  .guide-card h4 {
    font-size: 19px;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 14px;
    color: var(--text-primary);
  }
  .guide-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.55;
    margin-bottom: 16px;
  }
  .guide-card .gc-code {
    font-family: "SF Mono", ui-monospace, "JetBrains Mono", monospace;
    font-size: 12.5px;
    line-height: 1.65;
    color: var(--text-secondary);
    background: rgba(0,0,0,0.03);
    border: 1px solid var(--border-soft);
    border-radius: 12px;
    padding: 16px 18px;
    overflow-x: auto;
    white-space: pre;
  }
  .guide-card .gc-code .c-comment { color: #8E8E93; font-style: italic; }
  .guide-card .gc-code .c-section { color: #7A5CFF; font-weight: 600; }
  .guide-card .gc-code .c-key { color: #1C1C1E; }
  .guide-card .gc-code .c-string { color: #00A86B; }
  .guide-card .gc-code .c-bool { color: #B4514B; }

  /* ============ 联机说明 ============ */
  .multiplayer { padding: 80px 24px; }
  .mp-card {
    max-width: 880px;
    margin: 0 auto;
    padding: 40px 44px;
    border-radius: 24px;
    background: var(--glass-bg);
    border: 1px solid var(--border-soft);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
  }
  .mp-rules {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 8px;
  }
  .mp-rule {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 16px 18px;
    border-radius: 14px;
    background: rgba(255,255,255,0.45);
    border: 1px solid var(--border-soft);
  }
  .mp-rule .r-dot {
    flex-shrink: 0;
    width: 22px; height: 22px;
    border-radius: 50%;
    background: var(--accent-grad);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .mp-rule .r-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
  }
  .mp-rule .r-text strong { color: var(--text-primary); font-weight: 600; }

  /* ============ FAQ ============ */
  .faq { padding: 80px 24px 120px; }
  .faq-list {
    max-width: 820px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  details.faq-item {
    padding: 22px 26px;
    border-radius: 18px;
    background: var(--glass-bg);
    border: 1px solid var(--border-soft);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    transition: border-color 0.3s ease, background 0.3s ease;
  }
  details.faq-item[open] {
    background: var(--glass-bg-strong);
    border-color: rgba(122,92,255,0.2);
  }
  details.faq-item summary {
    list-style: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    letter-spacing: -0.005em;
  }
  details.faq-item summary::-webkit-details-marker { display: none; }
  details.faq-item summary::after {
    content: "";
  }
  details.faq-item[open] summary::after {
    content: "";
  }
  details.faq-item .faq-a {
    margin-top: 14px;
    font-size: 14.5px;
    color: var(--text-secondary);
    line-height: 1.65;
  }
  details.faq-item .faq-a code {
    font-family: "SF Mono", ui-monospace, monospace;
    font-size: 13px;
    color: #7A5CFF;
    background: rgba(122,92,255,0.08);
    padding: 1px 6px;
    border-radius: 5px;
  }

  /* ============ 服务商支持区 ============ */
  .providers { padding: 100px 24px; text-align: center; }
  .provider-cloud {
    max-width: 880px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }
  .provider-chip {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 11px 20px;
    border-radius: 980px;
    background: var(--glass-bg);
    border: 1px solid var(--border-soft);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    transition: transform 0.25s ease, border-color 0.25s ease, color 0.25s ease;
  }
  .provider-chip:hover {
    transform: translateY(-2px);
    border-color: rgba(122, 92, 255, 0.3);
    color: var(--text-primary);
  }

  /* ============ 页脚 ============ */
  footer {
    padding: 80px 24px 48px;
    text-align: center;
    border-top: 1px solid var(--border-soft);
    background: rgba(255, 255, 255, 0.4);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
  }
  .footer-links {
    display: flex;
    justify-content: center;
    gap: 36px;
    margin-bottom: 28px;
  }
  .footer-links a {
    font-size: 14px;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: color 0.2s ease;
  }
  .footer-links a:hover { color: var(--text-primary); }
  .footer-links svg { width: 16px; height: 16px; }
  .footer-copy {
    font-size: 13px;
    color: var(--text-tertiary);
    letter-spacing: 0.01em;
  }
  .footer-copy .dot { margin: 0 8px; opacity: 0.5; }

  /* ============ 响应式 ============ */
  @media (max-width: 860px) {
    .nav-links { display: none; }
    .feature {
      grid-template-columns: 1fr;
      gap: 28px;
      padding: 32px 28px;
    }
    .feature:nth-child(odd) .feature-text,
    .feature:nth-child(odd) .feature-visual,
    .feature:nth-child(even) .feature-text,
    .feature:nth-child(even) .feature-visual { order: unset; }
    .hero { padding-top: 100px; }
    pre.code { padding: 22px 20px; font-size: 12.5px; }
    .steps { grid-template-columns: 1fr; }
    .arch-grid { grid-template-columns: 1fr; }
    .arch-row { flex-direction: column; }
    .arch-branch { width: 90%; }
    .arch-api-grid { width: 90%; }
    .flow-chain ol { grid-template-columns: 1fr; }
    .guide-grid { grid-template-columns: 1fr; }
    .mp-rules { grid-template-columns: 1fr; }
  }
  @media (max-width: 520px) {
    .nav-actions .docs-link { display: none; }
    .footer-links { flex-wrap: wrap; gap: 20px; }
  }

  @media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
  }