@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,600;0,700;1,400&family=Inter:wght@300;400;500;600&display=swap');

  :root {
    --bg: #08090c;
    --bg2: #0d0f14;
    --card: #11141b;
    --card-hover: #171b24;
    --border: #232833;
    --border-warm: #3a3228;
    --text: #e8e4dc;
    --muted: #9a978f;
    --muted2: #7a776f;
    --gold: #c9a96e;
    --gold-soft: #b89a5e;
    --gold-dim: rgba(201, 169, 110, 0.14);
    --tag-bg: #1a1d26;
    --code-bg: #0c0e13;
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }

  body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    font-weight: 300;
    font-size: 16px;
    line-height: 1.75;
    padding: 0 20px 100px;
    position: relative;
    overflow-x: hidden;
  }

  body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 91;
    pointer-events: none;
    opacity: 0.05;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  }
  body::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 90;
    pointer-events: none;
    background: radial-gradient(ellipse at 50% 40%, transparent 45%, rgba(0,0,0,0.55) 100%);
  }

  .bg-layers {
    position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden;
    background:
      radial-gradient(ellipse 80% 50% at 50% -10%, rgba(201,169,110,0.10), transparent 70%),
      radial-gradient(ellipse 60% 40% at 88% 102%, rgba(108,140,255,0.07), transparent 70%),
      linear-gradient(180deg, #08090c 0%, #0a0b10 40%, #0b0d12 100%);
  }
  .bg-glow { position: absolute; border-radius: 50%; filter: blur(90px); }
  .bg-glow--top {
    top: -240px; left: 50%; transform: translateX(-50%);
    width: 920px; height: 500px;
    background: radial-gradient(ellipse, rgba(201,169,110,0.14), transparent 70%);
  }
  .bg-glow--bottom {
    bottom: -220px; right: -120px;
    width: 620px; height: 620px;
    background: radial-gradient(circle, rgba(108,140,255,0.08), transparent 70%);
  }
  .bg-grid {
    position: absolute; inset: 0;
    background-image:
      linear-gradient(rgba(201,169,110,0.04) 1px, transparent 1px),
      linear-gradient(90deg, rgba(201,169,110,0.04) 1px, transparent 1px);
    background-size: 72px 72px;
    -webkit-mask-image: radial-gradient(ellipse 72% 62% at 50% 28%, black 18%, transparent 82%);
    mask-image: radial-gradient(ellipse 72% 62% at 50% 28%, black 18%, transparent 82%);
    opacity: 0.75;
  }

  .navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 200;
    background: rgba(8, 9, 12, 0.75);
    backdrop-filter: blur(18px) saturate(140%);
    -webkit-backdrop-filter: blur(18px) saturate(140%);
    border-bottom: 1px solid rgba(201,169,110,0.10);
    transition: background 0.3s, border-color 0.3s;
  }
  .navbar.scrolled {
    background: rgba(8, 9, 12, 0.94);
    border-bottom-color: rgba(201,169,110,0.18);
  }
  .nav-inner {
    max-width: 1100px; margin: 0 auto; height: 64px; padding: 0 20px;
    display: flex; align-items: center; justify-content: space-between; gap: 24px;
  }
  .nav-brand {
    font-family: 'Cormorant Garamond', 'Songti SC', serif;
    font-size: 18px; font-weight: 600; letter-spacing: 0.04em;
    color: var(--text); text-decoration: none;
    display: flex; align-items: center; gap: 10px;
    white-space: nowrap; flex-shrink: 0;
  }
  .brand-mark {
    width: 6px; height: 20px;
    background: linear-gradient(180deg, var(--gold), transparent);
    display: inline-block; border-radius: 1px;
  }
  .nav-links {
    display: flex; align-items: center; gap: 2px;
    overflow-x: auto; scrollbar-width: none; -ms-overflow-style: none;
  }
  .nav-links::-webkit-scrollbar { display: none; }
  .nav-link {
    font-size: 14px; font-weight: 400; letter-spacing: 0.06em;
    color: var(--muted); text-decoration: none;
    padding: 8px 13px; border-radius: 3px; white-space: nowrap;
    transition: color 0.2s, background 0.2s; position: relative;
  }
  .nav-link:hover { color: var(--text); background: rgba(255,255,255,0.04); }
  .nav-link.active { color: var(--gold); background: rgba(201,169,110,0.08); }
  .nav-link.active::after {
    content: ""; position: absolute; left: 13px; right: 13px; bottom: 3px;
    height: 1px; background: linear-gradient(90deg, transparent, var(--gold-soft), transparent);
  }

  .container { max-width: 1120px; margin: 0 auto; position: relative; z-index: 1; }

  .header { text-align: center; padding: 132px 0 48px; position: relative; }
  .kicker {
    font-family: 'Inter', sans-serif; font-size: 12px; font-weight: 500;
    letter-spacing: 0.3em; text-transform: uppercase; color: var(--gold-soft);
    margin-bottom: 24px; display: flex; align-items: center; justify-content: center; gap: 14px;
  }
  .kicker::before, .kicker::after {
    content: ""; width: 36px; height: 1px;
    background: linear-gradient(90deg, transparent, var(--gold-soft));
  }
  .kicker::after { background: linear-gradient(90deg, var(--gold-soft), transparent); }

  .header h1 {
    font-family: 'Cormorant Garamond', 'Songti SC', serif;
    font-size: clamp(34px, 5.2vw, 58px); font-weight: 600;
    line-height: 1.2; letter-spacing: 0.01em; margin-bottom: 20px; color: var(--text);
  }
  .header h1 em { font-style: italic; color: var(--gold); }
  .header .sub {
    color: var(--muted); font-size: 16px; font-weight: 300;
    max-width: 680px; margin: 0 auto; letter-spacing: 0.02em; line-height: 1.75;
  }
  .header-cta { margin-top: 36px; display: flex; justify-content: center; }
  .cta-btn {
    display: inline-flex; align-items: center; gap: 12px;
    padding: 13px 30px; border: 1px solid rgba(201,169,110,0.45);
    border-radius: 3px;
    background: linear-gradient(180deg, rgba(201,169,110,0.13), rgba(201,169,110,0.04));
    color: var(--gold); font-family: 'Inter', 'PingFang SC', sans-serif;
    font-size: 15px; font-weight: 500; letter-spacing: 0.08em;
    text-decoration: none; position: relative; overflow: hidden;
    transition: border-color 0.3s, background 0.3s, color 0.3s, box-shadow 0.3s;
  }
  .cta-btn::before {
    content: ""; position: absolute; inset: 0;
    background: linear-gradient(90deg, transparent, rgba(201,169,110,0.22), transparent);
    transform: translateX(-100%); transition: transform 0.55s ease;
  }
  .cta-btn:hover {
    border-color: var(--gold);
    background: linear-gradient(180deg, rgba(201,169,110,0.22), rgba(201,169,110,0.08));
    color: #e8d4a8; box-shadow: 0 0 24px rgba(201,169,110,0.12);
  }
  .cta-btn:hover::before { transform: translateX(100%); }
  .cta-btn .cta-arrow { transition: transform 0.3s; font-size: 16px; line-height: 1; }
  .cta-btn:hover .cta-arrow { transform: translateX(5px); }

  .rule { width: 48px; height: 1px; background: var(--gold-soft); margin: 34px auto 0; opacity: 0.5; }

  .pipeline {
    display: flex; justify-content: center; align-items: center;
    flex-wrap: wrap; gap: 0; margin: 44px 0 68px;
    font-size: 14px; color: var(--muted2); letter-spacing: 0.06em;
  }
  .pipeline span { padding: 4px 2px; }
  .pipeline .arrow { color: var(--border-warm); padding: 0 10px; font-size: 13px; }

  .step { position: relative; padding-left: 80px; margin-bottom: 56px; scroll-margin-top: 92px; }
  .step::before {
    content: ""; position: absolute; left: 29px; top: 48px; bottom: -56px;
    width: 1px; background: linear-gradient(to bottom, var(--border), transparent);
  }
  .step:last-child::before { display: none; }

  .step-num {
    position: absolute; left: 0; top: 0; width: 60px; height: 60px;
    border-radius: 50%; background: var(--bg2); border: 1px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    font-family: 'Cormorant Garamond', serif; font-weight: 600;
    font-size: 22px; color: var(--gold); letter-spacing: 0.04em;
    z-index: 1; transition: border-color 0.3s;
  }
  .step:hover .step-num { border-color: var(--gold-soft); }

  .step-header { margin-bottom: 22px; }
  .step-title {
    font-family: 'Cormorant Garamond', 'Songti SC', serif;
    font-size: 28px; font-weight: 600; letter-spacing: 0.02em;
    margin-bottom: 8px; color: var(--text);
  }
  .step-desc {
    font-size: 15px; color: var(--muted); max-width: 720px;
    font-weight: 300; line-height: 1.8;
  }

  .tools {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px;
  }
  .tool {
    background: var(--card); border: 1px solid var(--border);
    border-radius: 4px; padding: 20px 22px;
    transition: background 0.3s, border-color 0.3s, transform 0.2s;
    position: relative; overflow: hidden;
  }
  .tool::before {
    content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 1px;
    background: linear-gradient(90deg, transparent, rgba(201,169,110,0.25), transparent);
    opacity: 0; transition: opacity 0.3s;
  }
  .tool:hover { background: var(--card-hover); border-color: var(--border-warm); transform: translateY(-1px); }
  .tool:hover::before { opacity: 1; }

  .tool-name {
    font-weight: 500; font-size: 16px; margin-bottom: 8px;
    display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
    color: var(--text); letter-spacing: 0.01em;
  }
  .tool-name a {
    color: inherit; text-decoration: none;
    border-bottom: 1px dotted rgba(201,169,110,0.35);
    transition: color 0.2s, border-color 0.2s;
  }
  .tool-name a:hover { color: var(--gold); border-bottom-color: var(--gold); }

  .tool-tag {
    font-family: 'Inter', sans-serif; font-size: 10px; font-weight: 500;
    padding: 2px 8px; border-radius: 2px; background: var(--tag-bg);
    color: var(--muted2); letter-spacing: 0.08em; text-transform: uppercase;
    border: 1px solid transparent;
  }
  .tool-tag.hot {
    background: var(--gold-dim); color: var(--gold);
    border-color: rgba(201,169,110,0.18);
  }
  .tool-tag.recommend {
    background: linear-gradient(135deg, #d4b47a, #a8894f);
    color: #14161c; font-weight: 700; letter-spacing: 0.06em;
    border-color: transparent; box-shadow: 0 0 0 1px rgba(201,169,110,0.25);
  }
  .tool-desc { font-size: 14px; color: var(--muted); line-height: 1.7; font-weight: 300; }

  .oneshot {
    margin-top: 24px;
    background: linear-gradient(160deg, rgba(201,169,110,0.04), rgba(13,15,20,0.9) 40%);
    border: 1px solid var(--border);
    border-radius: 6px; padding: 38px 38px 34px;
    position: relative; scroll-margin-top: 92px;
  }
  .oneshot::before {
    content: ""; position: absolute; top: 0; left: 34px; right: 34px; height: 1px;
    background: linear-gradient(90deg, transparent, rgba(201,169,110,0.25), transparent);
  }
  .oneshot h2 {
    font-family: 'Cormorant Garamond', 'Songti SC', serif;
    font-size: 26px; font-weight: 600; letter-spacing: 0.02em;
    margin-bottom: 10px; color: var(--text);
  }
  .oneshot > p {
    font-size: 15px; color: var(--muted); margin-bottom: 28px;
    max-width: 720px; font-weight: 300; line-height: 1.8;
  }
  .oneshot .tools { grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); }
  .oneshot .tool { background: rgba(10, 12, 17, 0.65); border-color: #1e222b; }

  .section-head { margin-bottom: 30px; }
  .section-kicker {
    font-family: 'Inter', sans-serif; font-size: 12px; font-weight: 500;
    letter-spacing: 0.26em; text-transform: uppercase; color: var(--gold-soft);
    margin-bottom: 12px;
  }
  .section-head h2 {
    font-family: 'Cormorant Garamond', 'Songti SC', serif;
    font-size: 30px; font-weight: 600; letter-spacing: 0.02em; color: var(--text);
  }
  .section-head p { font-size: 15px; color: var(--muted); margin-top: 8px; font-weight: 300; line-height: 1.75; }

  .prompt-section { margin-top: 68px; scroll-margin-top: 92px; }
  .prompt-tabs {
    display: flex; gap: 4px; flex-wrap: wrap;
    border-bottom: 1px solid var(--border); margin-bottom: 24px;
  }
  .prompt-tab {
    background: none; border: none; cursor: pointer;
    font-family: 'Inter', 'PingFang SC', sans-serif;
    font-size: 14px; font-weight: 400; letter-spacing: 0.04em;
    color: var(--muted); padding: 10px 16px 12px;
    position: relative; transition: color 0.2s; white-space: nowrap;
  }
  .prompt-tab:hover { color: var(--text); }
  .prompt-tab.active { color: var(--gold); }
  .prompt-tab.active::after {
    content: ""; position: absolute; left: 16px; right: 16px; bottom: -1px;
    height: 2px; background: var(--gold-soft);
  }
  .prompt-panel { display: none; }
  .prompt-panel.active { display: block; }
  .prompt-block {
    background: var(--card); border: 1px solid var(--border);
    border-radius: 4px; padding: 26px 28px; margin-bottom: 12px;
  }
  .prompt-block h3 {
    font-size: 17px; font-weight: 500; color: var(--text);
    margin-bottom: 12px; letter-spacing: 0.01em;
  }
  .prompt-block p {
    font-size: 15px; color: var(--muted); line-height: 1.8; margin-bottom: 12px;
  }
  .prompt-block p:last-child { margin-bottom: 0; }
  .formula {
    background: var(--code-bg); border: 1px solid #1e222b;
    border-radius: 4px; padding: 16px 18px;
    font-family: 'SFMono-Regular', 'Menlo', 'Consolas', monospace;
    font-size: 13.5px; line-height: 1.8; color: var(--text);
    overflow-x: auto; margin: 14px 0; white-space: pre-wrap; word-break: break-word;
  }
  .formula .kw { color: var(--gold); font-weight: 500; }
  .formula .dim { color: var(--muted2); }
  .prompt-note {
    font-size: 13.5px; color: var(--muted2); line-height: 1.7;
    border-left: 2px solid var(--gold-dim); padding-left: 14px; margin-top: 14px;
  }

  .faq-section { margin-top: 68px; scroll-margin-top: 92px; }
  .faq-list { display: flex; flex-direction: column; gap: 0; }
  .faq-item { border-bottom: 1px solid var(--border); }
  .faq-q {
    width: 100%; background: none; border: none; cursor: pointer;
    display: flex; align-items: flex-start; justify-content: space-between;
    gap: 20px; padding: 22px 0; text-align: left;
    font-family: 'Inter', 'PingFang SC', sans-serif;
    font-size: 16px; font-weight: 400; color: var(--text);
    letter-spacing: 0.01em; line-height: 1.6; transition: color 0.2s;
  }
  .faq-q:hover { color: var(--gold); }
  .faq-q .faq-icon {
    font-family: 'Cormorant Garamond', serif;
    font-size: 22px; color: var(--gold-soft); flex-shrink: 0;
    transition: transform 0.25s; line-height: 1;
  }
  .faq-item.open .faq-q .faq-icon { transform: rotate(45deg); }
  .faq-a {
    max-height: 0; overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    font-size: 15px; color: var(--muted); line-height: 1.8;
    font-weight: 300; padding: 0;
  }
  .faq-item.open .faq-a { max-height: 640px; padding: 0 0 24px 0; }
  .faq-a p + p { margin-top: 10px; }

  .news-section { margin-top: 68px; scroll-margin-top: 92px; }
  .news-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 12px; align-items: stretch;
  }
  .news-card {
    background: var(--card); border: 1px solid var(--border);
    border-radius: 4px; padding: 24px 24px 22px;
    display: flex; flex-direction: column; position: relative; overflow: hidden;
    transition: background 0.25s, border-color 0.25s, transform 0.2s;
  }
  .news-card::before {
    content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 1px;
    background: linear-gradient(90deg, transparent, rgba(201,169,110,0.3), transparent);
    opacity: 0; transition: opacity 0.25s;
  }
  .news-card:hover { background: var(--card-hover); border-color: var(--border-warm); transform: translateY(-1px); }
  .news-card:hover::before { opacity: 1; }
  .news-meta {
    display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 12px;
  }
  .news-date {
    font-family: 'Inter', sans-serif; font-size: 11.5px; font-weight: 500;
    letter-spacing: 0.06em; color: var(--gold-soft);
    background: rgba(201,169,110,0.08); padding: 3px 9px; border-radius: 2px;
  }
  .news-tool {
    font-size: 11.5px; font-weight: 500; letter-spacing: 0.05em;
    color: var(--muted2); text-transform: uppercase;
  }
  .news-title {
    font-size: 16px; font-weight: 500; color: var(--text);
    line-height: 1.55; letter-spacing: 0.01em; margin-bottom: 10px;
  }
  .news-body {
    font-size: 14px; color: var(--muted); line-height: 1.75;
    font-weight: 300; flex: 1;
  }
  .news-src {
    display: inline-block; align-self: flex-start;
    margin-top: 16px; padding-top: 12px;
    font-size: 12px; color: var(--muted2); letter-spacing: 0.02em;
    border-top: 1px solid var(--border); width: 100%;
    text-decoration: none; transition: color 0.2s;
  }
  .news-src:hover { color: var(--gold-soft); }

  .footer-note {
    margin-top: 60px; font-size: 13px; color: var(--muted2);
    text-align: center; line-height: 2; letter-spacing: 0.02em;
    border-top: 1px solid var(--border); padding-top: 34px;
  }

  @media (max-width: 720px) {
    body { padding: 0 16px 64px; }
    .header { padding: 104px 0 32px; }
    .step { padding-left: 60px; }
    .step-num { width: 46px; height: 46px; font-size: 18px; }
    .step::before { left: 22px; top: 40px; }
    .step-title { font-size: 24px; }
    .tools { grid-template-columns: 1fr; }
    .oneshot { padding: 28px 22px 24px; }
    .oneshot::before { left: 22px; right: 22px; }
    .nav-inner { height: 58px; padding: 0 16px; gap: 12px; }
    .nav-brand { font-size: 16px; }
    .nav-link { font-size: 13px; padding: 7px 10px; }
    .news-grid { grid-template-columns: 1fr; }
    .faq-q { font-size: 15px; }
    .prompt-block { padding: 22px 20px; }
    .formula { font-size: 13px; }
    .cta-btn { padding: 12px 22px; font-size: 14px; }
  }
  @media (max-width: 420px) {
    .brand-text { display: none; }
    .header h1 { font-size: 30px; }
  }