/* ===== 芯片专家老李Ai · 共享样式 ===== */
:root {
  --navy: #0a1628;
  --navy-light: #0f1f3a;
  --navy-mid: #162a50;
  --blue-deep: #1a3a6b;
  --blue: #2b6cb0;
  --blue-light: #3b82f6;
  --blue-glow: #60a5fa;
  --teal: #06b6d4;
  --violet: #8b5cf6;
  --emerald: #10b981;
  --amber: #f59e0b;
  --rose: #e11d48;
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --radius: 16px;
  --radius-sm: 10px;
  --card-bg: #fff;
  --max-w: 1100px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Inter','Noto Sans SC',-apple-system,sans-serif;
  background:#f6f8fc;color:var(--slate-800);line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}

/* ===== 导航 ===== */
nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(10,22,40,.92);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(255,255,255,.05);
  padding:0 max(24px,calc((100vw - var(--max-w))/2));height:64px;
  display:flex;align-items:center;justify-content:space-between;
}
nav .logo{font-size:1.05rem;font-weight:700;color:#fff;letter-spacing:.02em}
nav .logo span{color:var(--blue-glow)}
nav .nav-links{display:flex;gap:4px;list-style:none;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
nav .nav-links::-webkit-scrollbar{display:none}
nav .nav-links a{
  color:var(--slate-400);font-size:.84rem;padding:7px 14px;
  border-radius:6px;transition:all .2s;white-space:nowrap;font-weight:500;
}
nav .nav-links a:hover,
nav .nav-links a.active{color:#fff;background:rgba(255,255,255,.08)}
.hamburger{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer;padding:4px}

/* ===== Hero ===== */
.hero{
  padding:124px 24px 72px;
  background:linear-gradient(135deg,var(--navy),var(--navy-light),var(--navy));
  text-align:center;position:relative;overflow:hidden;
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:
    radial-gradient(ellipse 600px 400px at 20% 30%,rgba(59,130,246,.08) 0%,transparent 70%),
    radial-gradient(ellipse 500px 500px at 80% 60%,rgba(6,182,212,.06) 0%,transparent 70%),
    radial-gradient(ellipse 300px 300px at 50% 80%,rgba(139,92,246,.05) 0%,transparent 70%);
}
.hero-philosophy,.hero-warrior{position:absolute;inset:0;pointer-events:none;user-select:none}
.dao-mark{position:absolute;right:9%;top:2%;font-family:'Noto Serif SC',serif;font-size:clamp(8rem,18vw,16rem);font-weight:700;color:rgba(255,255,255,.055);line-height:1}
.kungfu-mark{position:absolute;left:2%;bottom:-2%;font-family:'Noto Serif SC',serif;font-size:clamp(5rem,11vw,10rem);font-weight:800;letter-spacing:.06em;color:rgba(255,255,255,.05);line-height:1;writing-mode:vertical-rl}
.dao-copy{position:absolute;right:6%;top:18%;display:flex;flex-direction:column;gap:8px;font-family:'Noto Serif SC',serif;font-size:.78rem;letter-spacing:.18em;color:rgba(255,255,255,.16)}
.dao-line{position:absolute;right:6%;top:34%;writing-mode:vertical-rl;font-family:'Noto Serif SC',serif;font-size:.68rem;letter-spacing:.18em;color:rgba(255,255,255,.14)}
.craft-words{position:absolute;right:18%;bottom:8%;display:flex;gap:18px;font-family:'Noto Serif SC',serif;font-size:.66rem;letter-spacing:.16em;color:rgba(255,255,255,.15)}
.wisdom{position:absolute;top:21%;writing-mode:vertical-rl;font-family:'Noto Serif SC',serif;color:rgba(255,255,255,.24);font-size:.72rem;letter-spacing:.14em;line-height:1.8}
.wisdom strong{font-weight:500;color:rgba(96,165,250,.35);margin-top:8px}
.wisdom-left{left:4%}.wisdom-right{left:9%}
.hero-warrior{inset:auto 4% -30px auto;width:220px;height:300px;opacity:.1}
.hero-warrior svg{display:block;width:100%;height:100%}
.hero-content{position:relative;z-index:1;max-width:900px;margin:0 auto}
.hero-eyebrow{display:inline-flex;align-items:center;padding:6px 13px;border:1px solid rgba(96,165,250,.24);border-radius:999px;background:rgba(59,130,246,.08);color:#93c5fd;font-size:.68rem;font-weight:700;letter-spacing:.16em;margin-bottom:20px}
.hero h1{font-size:clamp(2rem,4.8vw,3.25rem);font-weight:800;color:#fff;line-height:1.18;letter-spacing:-.025em;margin-bottom:18px}
.hero h1 span{color:var(--blue-glow)}
.hero p{font-size:clamp(.92rem,1.8vw,1.08rem);color:#9ba9bd;line-height:1.8;max-width:680px;margin:0 auto 30px}
.hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:36px}
.btn-primary,.btn-outline{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:46px;padding:11px 26px;border-radius:11px;
  font-size:.9rem;font-weight:600;transition:all .2s;cursor:pointer;
}
.btn-primary{background:var(--blue-light);color:#fff;border:none}
.btn-primary:hover{background:#2563eb;transform:translateY(-2px);box-shadow:0 8px 24px rgba(59,130,246,.3)}
.btn-outline{border:1px solid rgba(255,255,255,.2);color:#fff;background:transparent}
.btn-outline:hover{border-color:var(--blue-light);color:var(--blue-glow);transform:translateY(-2px)}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);max-width:660px;margin:0 auto;border:1px solid rgba(255,255,255,.07);border-radius:14px;background:rgba(255,255,255,.025);overflow:hidden}
.hero-stat{text-align:center;padding:15px 12px;position:relative}
.hero-stat:not(:last-child)::after{content:'';position:absolute;right:0;top:22%;bottom:22%;width:1px;background:rgba(255,255,255,.08)}
.hero-stat .num{font-size:1.6rem;font-weight:800;color:#fff}
.hero-stat .num span{color:var(--blue-glow)}
.hero-stat .label{font-size:.8rem;color:var(--slate-500);margin-top:2px}

/* ===== 通用区块 ===== */
.section{max-width:var(--max-w);margin:0 auto;padding:56px 24px}
.section-center{text-align:center}
.section-alt{background:var(--slate-50)}
.section-kicker{font-size:.68rem;font-weight:800;letter-spacing:.18em;color:var(--blue-light);margin-bottom:8px}
.section-title{font-size:clamp(1.55rem,3vw,2rem);font-weight:800;letter-spacing:-.02em;color:var(--slate-900);margin-bottom:9px}
.section-desc{font-size:.94rem;color:var(--slate-500);line-height:1.75;margin-bottom:30px;max-width:720px}
.section-center .section-desc{margin-left:auto;margin-right:auto}

/* ===== 书籍路径 ===== */
.path-box{
  background:var(--card-bg);border:1px solid var(--slate-200);border-radius:var(--radius);
  padding:28px 32px;margin-bottom:40px;
}
.path-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px;margin-bottom:16px}
.path-card{padding:14px 16px;border-radius:var(--radius-sm);background:var(--slate-50)}
.path-card .tag{font-size:.75rem;font-weight:600;margin-bottom:4px}
.path-card .name{font-size:.95rem;font-weight:700;color:var(--slate-900)}
.path-card .num{font-size:.7rem;color:var(--slate-400);margin-top:2px}
.path-flow{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:.82rem;color:var(--slate-500)}
.path-flow span{padding:3px 10px;border-radius:4px}
.path-flow .sep{color:var(--slate-300);padding:0}

/* ===== 书籍卡片 ===== */
.books-grid{display:grid;gap:24px}
.bcard{
  background:var(--card-bg);border:1px solid var(--slate-200);border-radius:var(--radius);
  padding:28px 32px;cursor:pointer;transition:all .25s;position:relative;
}
.bcard:hover{box-shadow:0 8px 30px rgba(0,0,0,.06);border-color:var(--slate-300);transform:translateY(-2px)}
.bcard .bcard-top{display:flex;align-items:flex-start;gap:16px}
.bcard .bnum{
  width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:1rem;color:#fff;flex-shrink:0;
}
.bnum-1{background:#3b82f6}
.bnum-2{background:#06b6d4}
.bnum-3{background:#8b5cf6}
.bnum-4{background:#0d9488}
.bnum-5{background:#dc2626}
.bcard h3{font-size:1.05rem;font-weight:700;color:var(--slate-900);margin-bottom:4px;line-height:1.3}
.bcard .bsub{font-size:.8rem;margin-bottom:8px}
.bcard .bdesc{font-size:.85rem;color:var(--slate-600);line-height:1.7;margin-bottom:14px}
.bcard .btags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.btag{padding:2px 10px;border-radius:4px;font-size:.72rem;font-weight:600}
.btag-blue{background:rgba(59,130,246,.08);color:var(--blue)}
.btag-teal{background:rgba(6,182,212,.08);color:var(--teal)}
.btag-violet{background:rgba(139,92,246,.08);color:var(--violet)}
.btag-emerald{background:rgba(16,185,129,.08);color:var(--emerald)}
.btag-rose{background:rgba(220,38,38,.08);color:var(--rose)}
.bcard .baction{margin-top:12px;display:flex;gap:10px;flex-wrap:wrap}
.baction .btn-detail{
  padding:7px 18px;border-radius:8px;font-size:.8rem;font-weight:600;
  background:var(--slate-100);color:var(--slate-700);border:1px solid var(--slate-200);
  transition:all .2s;display:inline-flex;align-items:center;gap:6px;
}
.baction .btn-detail:hover{background:var(--slate-200);border-color:var(--slate-300);transform:translateY(-1px)}

/* ===== 知识卡片 ===== */
.k-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.kcard{
  background:var(--card-bg);border-radius:var(--radius-sm);border:1px solid var(--slate-200);
  padding:22px;transition:all .2s;display:block;
}
.kcard:hover{border-color:var(--slate-300);transform:translateY(-3px);box-shadow:0 4px 20px rgba(0,0,0,.04)}
.kcard .ktag{display:inline-block;padding:2px 10px;border-radius:4px;font-size:.7rem;font-weight:600;margin-bottom:10px}
.kt-blue{background:rgba(59,130,246,.08);color:var(--blue)}
.kt-teal{background:rgba(6,182,212,.08);color:var(--teal)}
.kt-violet{background:rgba(139,92,246,.08);color:var(--violet)}
.kt-amber{background:rgba(245,158,11,.08);color:#d97706}
.kt-emerald{background:rgba(16,185,129,.08);color:var(--emerald)}
.kt-rose{background:rgba(244,63,94,.08);color:var(--rose)}
.kcard h4{font-size:.88rem;font-weight:600;color:var(--slate-900);margin-bottom:6px;line-height:1.4}
.kcard p{font-size:.78rem;color:var(--slate-500);line-height:1.6;margin-bottom:12px}
.kcard .kfoot{display:flex;justify-content:space-between;align-items:center;font-size:.7rem;color:var(--slate-400);border-top:1px solid var(--slate-100);padding-top:10px}
.kcard .kfoot .plat{display:flex;gap:4px}
.kcard .kfoot .plat span{padding:1px 6px;border-radius:3px;font-size:.62rem;background:var(--slate-100);color:var(--slate-500)}

/* ===== Social ===== */
.social-section{background:linear-gradient(135deg,#0a1628,#0d1f3c,#0a1628);color:#fff}
.social-section .section-title{color:#fff}
.social-section .section-desc{color:var(--slate-400)}
.s-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px}
.scard{
  background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.06);
  border-radius:var(--radius);padding:28px 24px;text-align:center;transition:all .2s;
}
.scard:hover{background:rgba(255,255,255,.05);transform:translateY(-3px)}
.scard .sicon{width:46px;height:46px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:20px;margin:0 auto 14px}
.si-wx{background:rgba(6,182,212,.15);color:var(--teal)}
.si-bili{background:rgba(59,130,246,.15);color:var(--blue-light)}
.si-xhs{background:rgba(244,63,94,.15);color:var(--rose)}
.si-shop{background:rgba(7,193,96,.15);color:#34d399}
.social-action{display:inline-flex;align-items:center;justify-content:center;padding:8px 15px;border:1px solid rgba(52,211,153,.25);border-radius:8px;color:#6ee7b7;font-size:.78rem;font-weight:600;transition:all .2s}
.social-action:hover{background:rgba(52,211,153,.1);border-color:rgba(52,211,153,.45)}
.copy-mini-program{font-family:inherit;background:transparent;margin-top:8px;cursor:pointer}
.mini-program-entry{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;margin-top:16px;color:var(--slate-500);font-size:.72rem}
.mini-program-entry span{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;padding:5px 9px;border-radius:6px;background:rgba(15,23,42,.05)}
.mini-program-entry button{border:1px solid var(--slate-200);border-radius:7px;background:#fff;color:var(--slate-700);padding:6px 10px;font:inherit;font-weight:600;cursor:pointer}
.mini-program-entry button:hover{border-color:#07c160;color:#07984e}
.scard h4{font-size:.95rem;font-weight:600;margin-bottom:6px}
.scard p{font-size:.82rem;color:var(--slate-400);margin-bottom:12px;line-height:1.6}
.scard .sid{font-size:.78rem;color:var(--blue-light);font-weight:500;margin-bottom:12px}
.scard .qrcode{width:110px;height:110px;margin:0 auto;border-radius:6px;overflow:hidden;background:rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;font-size:.7rem;color:var(--slate-500)}

/* ===== 联系 ===== */
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}
.contact-info h3{font-size:1.05rem;font-weight:700;color:var(--slate-900);margin-bottom:12px}
.contact-info p{font-size:.88rem;color:var(--slate-600);margin-bottom:16px;line-height:1.7}
.citem{padding:10px 14px;background:var(--slate-50);border-radius:var(--radius-sm);margin-bottom:8px;font-size:.85rem;color:var(--slate-700)}

/* ===== Footer ===== */
footer{text-align:center;padding:32px 24px;font-size:.82rem;color:var(--slate-400);border-top:1px solid var(--slate-200);background:var(--card-bg)}

/* ===== 书籍详情页通用 ===== */
.book-detail-hero{
  padding:100px 24px 60px;
  background:linear-gradient(135deg,var(--navy),var(--navy-light),var(--navy));
  position:relative;overflow:hidden;
}
.book-detail-hero::before{
  content:'';position:absolute;inset:0;
  background:radial-gradient(ellipse 600px 400px at 20% 30%,rgba(59,130,246,.08) 0%,transparent 70%);
}
.book-detail-hero .inner{position:relative;z-index:1;max-width:var(--max-w);margin:0 auto;display:grid;grid-template-columns:auto 1fr;gap:32px;align-items:center}
.book-detail-hero .bd-num{
  width:80px;height:80px;border-radius:16px;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:1.8rem;color:#fff;flex-shrink:0;
}
.book-detail-hero h1{font-size:clamp(1.3rem,2.8vw,1.8rem);font-weight:800;color:#fff;margin-bottom:6px}
.book-detail-hero .bd-sub{font-size:.95rem;color:var(--slate-400);margin-bottom:14px}
.book-detail-hero .bd-meta{display:flex;gap:12px;flex-wrap:wrap}
.bd-meta span{padding:4px 14px;border-radius:6px;font-size:.8rem;font-weight:500;background:rgba(255,255,255,.06);color:var(--slate-300)}

.bd-content{max-width:var(--max-w);margin:0 auto;padding:48px 24px}
.bd-content h2{font-size:1.2rem;font-weight:700;color:var(--slate-900);margin-bottom:16px;padding-bottom:8px;border-bottom:2px solid var(--slate-200)}
.bd-content h3{font-size:1rem;font-weight:600;color:var(--slate-800);margin:24px 0 8px}
.bd-content p{font-size:.9rem;color:var(--slate-600);line-height:1.7;margin-bottom:14px}
.bd-intro{background:var(--card-bg);border:1px solid var(--slate-200);border-radius:var(--radius);padding:28px 32px;margin-bottom:36px}
.bd-intro .audience-box{background:var(--slate-50);border-left:3px solid var(--blue-light);padding:14px 18px;border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-size:.88rem;color:var(--slate-700);margin:16px 0 0;line-height:1.7}
.bd-intro .audience-box strong{color:var(--slate-900)}

/* ===== 目录表格 ===== */
.toc-table{width:100%;border-collapse:collapse;font-size:.85rem;border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--slate-200);background:var(--card-bg);margin-bottom:36px}
.toc-table th{background:var(--navy);color:#fff;font-weight:600;padding:10px 16px;text-align:left;font-size:.82rem}
.toc-table td{padding:10px 16px;border-bottom:1px solid var(--slate-100);vertical-align:top}
.toc-table tr:last-child td{border-bottom:none}
.toc-table .mod-name{font-weight:600;color:var(--slate-800);white-space:nowrap}
.toc-table .mod-ch{white-space:nowrap;color:var(--slate-500);font-size:.78rem}

.chapters-list{list-style:none;margin-bottom:36px}
.chapters-list li{padding:8px 0;border-bottom:1px solid var(--slate-100);font-size:.85rem;color:var(--slate-700);display:flex;gap:8px}
.chapters-list li .ch-num{color:var(--slate-400);font-weight:500;min-width:5em}

.bd-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;margin-bottom:36px}
.bd-feature{
  background:var(--card-bg);border:1px solid var(--slate-200);border-radius:var(--radius-sm);
  padding:18px 20px;
}
.bd-feature h4{font-size:.88rem;font-weight:600;color:var(--slate-900);margin-bottom:4px}
.bd-feature p{font-size:.8rem;color:var(--slate-500);line-height:1.5;margin:0}

.bd-cta{text-align:center;background:var(--slate-50);border-radius:var(--radius);padding:40px 32px;margin-top:36px}
.bd-cta h3{font-size:1.2rem;font-weight:700;color:var(--slate-900);margin-bottom:8px}
.bd-cta p{font-size:.9rem;color:var(--slate-500);margin-bottom:20px}

/* ===== 六大产品书架 ===== */
.btn-buy-small:hover{transform:translateY(-1px);box-shadow:0 2px 8px rgba(7,193,96,.25)}
.books-showcase{max-width:1000px;margin:0 auto}
.book-shelf{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.shelf-item{border-radius:18px;padding:24px 22px;color:#fff;position:relative;overflow:hidden;isolation:isolate;transition:transform .25s ease,box-shadow .25s ease;cursor:pointer;min-height:210px;display:flex;flex-direction:column;text-align:left;box-shadow:inset 0 1px 0 rgba(255,255,255,.15),0 8px 24px rgba(15,23,42,.08)}
.shelf-item:hover{transform:translateY(-5px);box-shadow:inset 0 1px 0 rgba(255,255,255,.18),0 18px 38px rgba(15,23,42,.16)}
.shelf-item::after{content:'';position:absolute;z-index:-1;top:-58px;right:-38px;width:150px;height:150px;border-radius:50%;background:rgba(255,255,255,.1)}
.shelf-item::before{content:'';position:absolute;z-index:-1;inset:0;background:linear-gradient(145deg,rgba(255,255,255,.08),transparent 46%)}
.shelf-num{font-size:.7rem;font-weight:800;letter-spacing:.12em;opacity:.72;margin-bottom:20px}
.shelf-title{font-size:1.08rem;font-weight:750;line-height:1.35;letter-spacing:-.01em;margin-bottom:7px;max-width:92%}
.shelf-sub{font-size:.76rem;opacity:.8;line-height:1.55;margin-bottom:18px;flex:1}
.shelf-tag{font-size:.66rem;font-weight:700;padding:4px 10px;border:1px solid rgba(255,255,255,.14);border-radius:999px;background:rgba(255,255,255,.13);display:inline-flex;align-self:flex-start;backdrop-filter:blur(4px)}
.shelf-link{font-size:.7rem;font-weight:700;margin-top:12px;opacity:.82;transition:opacity .2s,transform .2s}
.shelf-item:hover .shelf-link{opacity:1;transform:translateX(3px)}
.shelf-dot{width:7px;height:7px;border-radius:50%;background:rgba(255,255,255,.45);box-shadow:0 0 0 6px rgba(255,255,255,.07);position:absolute;top:21px;right:22px}

/* ===== 六大产品独立详情页 ===== */
.product-page{--product-accent:#3b82f6;background:#f6f8fc;color:var(--slate-800)}
.product-nav{position:sticky;top:0;z-index:20;height:64px;padding:0 max(24px,calc((100vw - 1040px)/2));display:flex;align-items:center;justify-content:space-between;background:rgba(10,22,40,.95);backdrop-filter:blur(12px);color:#fff}
.product-nav>a:first-child{font-size:.84rem;color:var(--slate-300)}
.product-buy{padding:8px 15px;border-radius:8px;background:#07c160;font-size:.78rem;font-weight:700}
.product-hero{padding:72px max(24px,calc((100vw - 1040px)/2));display:grid;grid-template-columns:auto 1fr;gap:28px;align-items:center;background:linear-gradient(135deg,#0a1628,#102342);color:#fff}
.product-number{width:88px;height:88px;display:flex;align-items:center;justify-content:center;border-radius:22px;background:var(--product-accent);font-size:1.85rem;font-weight:800;box-shadow:0 16px 40px color-mix(in srgb,var(--product-accent) 30%,transparent)}
.product-label{font-size:.68rem;font-weight:800;letter-spacing:.18em;color:var(--product-accent);margin-bottom:8px}
.product-hero h1{font-size:clamp(1.55rem,3.6vw,2.45rem);line-height:1.25;letter-spacing:-.025em;margin-bottom:8px}
.product-hero p{font-size:.95rem;color:var(--slate-300);margin-bottom:16px}
.product-meta{display:flex;gap:8px;flex-wrap:wrap}
.product-meta span{padding:5px 11px;border:1px solid rgba(255,255,255,.12);border-radius:999px;background:rgba(255,255,255,.05);font-size:.72rem;color:var(--slate-300)}
.product-content{max-width:1040px;margin:0 auto;padding:48px 24px 72px}
.product-content h2{font-size:1.25rem;color:var(--slate-900);margin-bottom:15px}
.product-intro{padding:28px 30px;background:#fff;border:1px solid var(--slate-200);border-radius:18px;box-shadow:0 10px 30px rgba(15,23,42,.04);margin-bottom:24px}
.product-intro>p{font-size:.91rem;color:var(--slate-600);line-height:1.85}
.audience{display:grid;grid-template-columns:92px 1fr;gap:12px;margin-top:20px;padding:15px 18px;border-left:3px solid var(--product-accent);border-radius:0 10px 10px 0;background:var(--slate-50);font-size:.82rem;color:var(--slate-600)}
.audience strong{color:var(--slate-900)}
.product-columns{display:grid;grid-template-columns:.8fr 1.2fr;gap:24px;margin-bottom:42px}
.product-columns>section{padding:26px 28px;background:#fff;border:1px solid var(--slate-200);border-radius:18px}
.highlight-list{list-style:none;display:grid;gap:10px}
.highlight-list li{position:relative;padding:10px 12px 10px 34px;border-radius:9px;background:var(--slate-50);font-size:.84rem;color:var(--slate-700)}
.highlight-list li::before{content:'✓';position:absolute;left:12px;color:var(--product-accent);font-weight:800}
.catalog-list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:0 18px}
.catalog-list li{display:flex;gap:9px;padding:8px 0;border-bottom:1px solid var(--slate-100);font-size:.8rem;color:var(--slate-700)}
.catalog-list li span{font-size:.7rem;font-weight:800;color:var(--product-accent);min-width:22px}
.sample-section{padding-top:8px}
.sample-section>h2{font-size:1.55rem;margin-bottom:20px}
.sample-chapter{padding:26px 28px;margin-bottom:16px;background:#fff;border:1px solid var(--slate-200);border-radius:16px}
.sample-chapter h3{font-size:1rem;color:var(--slate-900);margin-bottom:10px}
.sample-chapter p{font-size:.86rem;line-height:1.85;color:var(--slate-600);margin-bottom:10px}
.sample-chapter p:last-child{margin-bottom:0}
.product-cta{text-align:center;margin-top:36px;padding:36px 24px;border-radius:18px;background:linear-gradient(135deg,#0a1628,#102342);color:#fff}
.product-cta h2{color:#fff;margin-bottom:6px}.product-cta p{font-size:.84rem;color:var(--slate-400);margin-bottom:18px}
.product-cta a{display:inline-flex;padding:10px 20px;border-radius:9px;background:#07c160;font-size:.82rem;font-weight:700}
.video-feature{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(260px,.75fr);gap:0;max-width:1000px;margin:0 auto;overflow:hidden;border:1px solid var(--slate-200);border-radius:20px;background:#08172b;box-shadow:0 18px 48px rgba(15,23,42,.15);text-align:left}
.video-feature video{display:block;width:100%;height:100%;min-height:350px;object-fit:cover;background:#061324}
.video-feature-copy{padding:34px 30px;display:flex;flex-direction:column;justify-content:center;color:#fff}
.video-feature-copy>span{font-size:.65rem;font-weight:800;letter-spacing:.14em;color:#60a5fa;margin-bottom:10px}
.video-feature-copy h3{font-size:1.25rem;line-height:1.45;margin-bottom:12px}
.video-feature-copy p{font-size:.82rem;line-height:1.7;color:var(--slate-400);margin-bottom:20px}
.video-feature-copy a{font-size:.8rem;font-weight:700;color:#93c5fd}
.media-credit{max-width:1000px;margin:10px auto 0;font-size:.62rem;color:var(--slate-400);text-align:left}
.product-video{max-width:1040px;margin:30px auto 0;padding:0 24px;text-align:center}
.product-video video{display:block;width:100%;border-radius:18px;background:#061324;box-shadow:0 15px 40px rgba(15,23,42,.16)}
.product-video p{font-size:.72rem;color:var(--slate-500);margin-top:8px}

/* ===== 3D 可视化工具页 ===== */
.tool-page{height:100vh;display:flex;flex-direction:column;overflow:hidden;background:var(--navy);color:#fff}
.tool-header{height:52px;display:flex;align-items:center;padding:0 20px;background:rgba(255,255,255,.03);border-bottom:1px solid rgba(255,255,255,.06);flex-shrink:0;gap:16px}
.tool-header .back-btn{color:var(--slate-400);font-size:.82rem;display:flex;align-items:center;gap:6px;transition:color .2s}
.tool-header .back-btn:hover{color:#fff}
.tool-header h1{font-size:.95rem;font-weight:600;flex:1}
.tool-header .controls{display:flex;gap:8px}
.tool-header .controls button{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);color:var(--slate-300);
  padding:5px 14px;border-radius:6px;font-size:.78rem;cursor:pointer;transition:all .2s;
}
.tool-header .controls button:hover{background:rgba(255,255,255,.1);color:#fff}
.tool-header .controls button.active{background:var(--blue-light);border-color:var(--blue-light);color:#fff}
#three-container{flex:1;position:relative}

/* ===== 移动端 ===== */
@media(max-width:768px){
  .hamburger{display:block}
  nav .nav-links{
    display:none;position:absolute;top:60px;left:0;right:0;
    background:rgba(10,22,40,.98);flex-direction:column;padding:12px 16px;
    border-bottom:1px solid rgba(255,255,255,.05);
  }
  nav .nav-links.open{display:flex}
  .hero{padding:104px 20px 56px}
  .hero-philosophy .dao-copy,.hero-philosophy .dao-line,.hero-philosophy .craft-words,.hero-philosophy .wisdom,.hero-warrior{display:none}
  .dao-mark{right:-3%;top:5%;font-size:8rem;color:rgba(255,255,255,.025)}
  .kungfu-mark{left:-4%;bottom:1%;font-size:5.5rem;color:rgba(255,255,255,.018)}
  .hero-stats{grid-template-columns:repeat(2,1fr);max-width:430px}
  .hero-stat:nth-child(2)::after{display:none}
  .hero-stat:nth-child(-n+2){border-bottom:1px solid rgba(255,255,255,.08)}
  .section{padding:48px 20px}
  .book-detail-hero .inner{grid-template-columns:1fr;text-align:center}
  .book-detail-hero .bd-meta{justify-content:center}
  .contact-wrap{grid-template-columns:1fr}
  .books-grid{gap:16px}
  .book-shelf{grid-template-columns:repeat(2,1fr)}
  .bcard{padding:20px}
  .toc-table{font-size:.8rem}
  .toc-table th,.toc-table td{padding:8px 10px}
  .product-hero{grid-template-columns:1fr;padding-top:48px;padding-bottom:48px}
  .product-number{width:68px;height:68px;border-radius:18px;font-size:1.35rem}
  .product-content{padding:32px 18px 56px}
  .product-columns{grid-template-columns:1fr}
  .catalog-list{grid-template-columns:1fr}
  .video-feature{grid-template-columns:1fr}
  .video-feature video{min-height:0;aspect-ratio:16/9}
  .video-feature-copy{padding:24px 22px}
}

@media(max-width:480px){
  .book-shelf{grid-template-columns:1fr}
  .shelf-item{min-height:170px}
  .hero-cta{display:grid;grid-template-columns:1fr;max-width:290px;margin-left:auto;margin-right:auto}
  .product-nav{padding:0 16px}
  .audience{grid-template-columns:1fr}
}

/* ===== 淡入动画 ===== */
.fade-in{opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}