/* ========== 基础与变量 ========== */
:root{
  --paper:#f7f2e9;
  --paper-2:#efe7d6;
  --paper-3:#e9dfc9;
  --ink:#2a2521;
  --ink-soft:#5c544b;
  --ink-faint:#8a7f72;
  --gold:#a8834f;
  --gold-deep:#8a6a3e;
  --gold-light:#c9a86a;
  --seal:#9e3b2c;
  --dark:#262019;
  --dark-2:#2f2820;
  --dark-text:#ece4d4;
  --dark-muted:#b6a68d;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STZhongsong","STSong","SimSun",serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{
  font-family:var(--serif);
  background:var(--paper);
  color:var(--ink);
  line-height:1.9;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
::selection{background:var(--gold-light);color:#fff}
a{color:inherit;text-decoration:none}
img{max-width:100%}

/* 全页纸纹噪点 */
body::after{
  content:"";position:fixed;inset:0;z-index:9998;pointer-events:none;opacity:.05;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ========== 通用 ========== */
.wrap{max-width:1100px;margin:0 auto;padding:0 28px}
.sec{padding:110px 0}
.sec-head{text-align:center;max-width:720px;margin:0 auto 64px}
.sec-tag{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border:1px solid var(--gold);
  color:var(--gold);font-size:20px;margin-bottom:22px;
}
.sec-head h2{
  font-size:clamp(26px,3.4vw,36px);font-weight:700;letter-spacing:.06em;line-height:1.5;
}
.sec-lead{margin-top:16px;color:var(--ink-soft);font-size:16px;letter-spacing:.04em}
.dark .sec-head h2{color:var(--dark-text)}
.dark .sec-lead{color:var(--dark-muted)}
.dark .sec-tag{border-color:var(--gold-light);color:var(--gold-light)}

/* 印章 */
.seal{
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--seal);color:#f7ecdd;border-radius:7px;
  writing-mode:vertical-rl;letter-spacing:.18em;
  font-weight:700;box-shadow:inset 0 0 0 1.5px rgba(247,236,221,.35);
  transform:rotate(-3deg);
}
.seal-lg{width:58px;height:88px;font-size:19px;padding:10px 0}
.seal-sm{width:26px;height:44px;font-size:11px;letter-spacing:.1em}

/* 按钮 */
.btn{
  display:inline-block;padding:14px 38px;font-size:15px;letter-spacing:.14em;
  border:1px solid var(--ink);transition:all .35s ease;cursor:pointer;
  font-family:var(--serif);
}
.btn-gold{background:var(--gold);border-color:var(--gold);color:#fff}
.btn-gold:hover{background:var(--gold-deep);border-color:var(--gold-deep);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--paper)}
.btn-ghost-dark{border-color:var(--dark-text);color:var(--dark-text)}
.btn-ghost-dark:hover{background:var(--dark-text);color:var(--dark)}

/* 分隔装饰 */
.orn{display:flex;align-items:center;justify-content:center;gap:14px;margin:0 auto}
.orn::before,.orn::after{content:"";height:1px;width:70px;background:linear-gradient(90deg,transparent,var(--gold));}
.orn::after{background:linear-gradient(90deg,var(--gold),transparent)}
.orn span{color:var(--gold);font-size:11px;letter-spacing:.4em}

/* 滚动显现 */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s ease,transform .9s ease;transition-delay:var(--d,0s)}
.reveal.in{opacity:1;transform:none}

/* ========== 导航 ========== */
nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:all .4s ease;padding:18px 0;
}
nav.scrolled{background:rgba(247,242,233,.94);backdrop-filter:blur(10px);padding:10px 0;box-shadow:0 1px 0 rgba(168,131,79,.25)}
.nav-inner{display:flex;align-items:center;justify-content:space-between}
.nav-logo{display:flex;align-items:center;gap:10px}
.nav-logo .wordmark{font-size:17px;letter-spacing:.12em;font-weight:700}
.nav-logo .wordmark small{font-weight:400;color:var(--ink-faint);font-size:12px;margin-left:6px;letter-spacing:.2em}
.nav-links{display:flex;gap:32px;font-size:14px;letter-spacing:.1em;color:var(--ink-soft)}
.nav-links a{position:relative;padding:4px 0;transition:color .3s}
.nav-links a:hover{color:var(--gold-deep)}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--gold);transition:width .3s}
.nav-links a:hover::after{width:100%}
.nav-cta{padding:9px 26px;font-size:13px;letter-spacing:.14em}

/* ========== 首屏 ========== */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  padding:140px 0 90px;
  background:
    radial-gradient(ellipse 900px 500px at 85% 10%,rgba(201,168,106,.16),transparent 60%),
    radial-gradient(ellipse 700px 500px at 8% 90%,rgba(158,59,44,.07),transparent 60%),
    linear-gradient(180deg,#f9f4ea 0%,var(--paper) 100%);
  overflow:hidden;
}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:center}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:12px;color:var(--gold-deep);
  font-size:13px;letter-spacing:.34em;margin-bottom:30px;
}
.hero-eyebrow::before{content:"";width:36px;height:1px;background:var(--gold)}
.hero h1{
  font-size:clamp(38px,5.6vw,62px);font-weight:700;letter-spacing:.05em;line-height:1.42;
}
.hero h1 em{font-style:normal;color:var(--gold-deep)}
.hero-sub{
  margin-top:28px;font-size:17px;color:var(--ink-soft);max-width:520px;letter-spacing:.03em;
}
.hero-sub b{color:var(--ink);font-weight:700}
.hero-ctas{display:flex;gap:18px;margin-top:44px;flex-wrap:wrap}
.hero-note{margin-top:26px;font-size:13px;color:var(--ink-faint);letter-spacing:.12em}
.hero-note i{font-style:normal;color:var(--gold);margin:0 8px}

/* 竖排侧注 */
.v-caption{
  position:absolute;right:34px;top:50%;transform:translateY(-50%);
  writing-mode:vertical-rl;letter-spacing:.6em;font-size:13px;color:var(--ink-faint);
  border-left:1px solid rgba(168,131,79,.4);padding-left:16px;
}

/* 漂浮米粒 */
.grain{position:absolute;width:7px;height:12px;border-radius:50%;
  background:linear-gradient(180deg,var(--gold-light),var(--gold));opacity:0;
  animation:rise 11s linear infinite;}
@keyframes rise{
  0%{transform:translateY(0) rotate(20deg);opacity:0}
  12%{opacity:.4}
  85%{opacity:.25}
  100%{transform:translateY(-56vh) rotate(-24deg);opacity:0}
}

/* 3D 书 */
.book-wrap{display:flex;justify-content:center;perspective:1400px}
.book-stack{position:relative;width:296px;height:410px;animation:floaty 7s ease-in-out infinite alternate}
@keyframes floaty{from{transform:translateY(-8px)}to{transform:translateY(10px)}}
.book-back{position:absolute;top:16px;right:-18px;bottom:-16px;left:16px;background:#1a150f;border-radius:6px}
.book-pages{
  position:absolute;top:8px;right:-9px;bottom:-8px;left:8px;border-radius:4px;
  background:repeating-linear-gradient(to bottom,#efe5cd 0 3px,#d8cbac 3px 5px);
}
.book-cover{
  position:absolute;inset:0;border-radius:4px 8px 8px 4px;overflow:hidden;
  background:linear-gradient(155deg,#463a2b 0%,#2c241a 55%,#201a12 100%);
  box-shadow:0 34px 60px -18px rgba(42,37,33,.5),inset 0 1px 0 rgba(201,168,106,.25);
}
.book-cover::before{ /* 皮革暗角 */
  content:"";position:absolute;inset:0;
  background:radial-gradient(ellipse at 50% 40%,transparent 40%,rgba(0,0,0,.42) 100%);
}
.book-frame{
  position:absolute;inset:22px;border:1px solid rgba(201,168,106,.75);
  display:flex;flex-direction:column;align-items:center;justify-content:space-between;
  padding:26px 0;
}
.book-frame::before{content:"";position:absolute;inset:5px;border:1px solid rgba(201,168,106,.35)}
.book-eyebrow{color:var(--gold-light);font-size:10px;letter-spacing:.5em;opacity:.85}
.book-title{
  writing-mode:vertical-rl;color:#d9b878;font-size:40px;font-weight:700;
  letter-spacing:.42em;text-shadow:0 1px 2px rgba(0,0,0,.55);
}
.book-foot{display:flex;flex-direction:column;align-items:center;gap:10px}
.book-foot .line{width:26px;height:1px;background:rgba(201,168,106,.6)}
.book-foot .press{color:var(--gold-light);font-size:10px;letter-spacing:.4em;opacity:.85}
.book-cover .seal{position:absolute;right:30px;bottom:58px;width:30px;height:50px;font-size:10px}
.ribbon{
  position:absolute;top:-4px;right:56px;width:16px;height:78px;background:var(--seal);
  clip-path:polygon(0 0,100% 0,100% 100%,50% calc(100% - 8px),0 100%);
  box-shadow:0 2px 5px rgba(0,0,0,.3);z-index:3;
}
.book-shadow{position:absolute;bottom:-46px;left:6%;right:6%;height:26px;border-radius:50%;
  background:radial-gradient(ellipse at center,rgba(42,37,33,.32),transparent 70%)}
.book-tag{
  margin-top:70px;text-align:center;font-size:12.5px;color:var(--ink-faint);letter-spacing:.22em;
}

/* ========== 品牌一瞬 ========== */
.interlude{padding:96px 0;background:var(--paper-2)}
.interlude-inner{max-width:640px;margin:0 auto;text-align:center}
.interlude p{
  font-size:19px;line-height:2.3;letter-spacing:.05em;color:var(--ink);
}
.interlude p b{color:var(--seal);font-weight:700}
.interlude .orn{margin:30px auto 34px}

/* ========== 壹 为什么 ========== */
.why-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.why-card{
  background:#fbf8f0;border:1px solid var(--paper-3);padding:44px 40px;
  position:relative;transition:transform .4s ease,box-shadow .4s ease,border-color .4s ease;
}
.why-card::before{
  content:"";position:absolute;top:0;left:0;width:0;height:3px;
  background:linear-gradient(90deg,var(--gold),var(--gold-light));transition:width .5s ease;
}
.why-card:hover{transform:translateY(-5px);box-shadow:0 22px 44px -20px rgba(90,74,52,.28);border-color:var(--gold-light)}
.why-card:hover::before{width:100%}
.why-num{font-size:13px;color:var(--gold);letter-spacing:.3em;margin-bottom:16px}
.why-card h3{font-size:21px;letter-spacing:.05em;margin-bottom:16px;font-weight:700}
.why-card p{color:var(--ink-soft);font-size:15px}
.why-card p b{color:var(--ink)}
/* 为什么章节标语 */
.why-tagline{
  text-align:center;font-size:clamp(19px,2.4vw,26px);letter-spacing:.14em;
  color:var(--seal);font-weight:700;margin:0 auto 56px;max-width:660px;line-height:1.9;
}

/* ========== 贰 流程 ========== */
#how{background:linear-gradient(180deg,var(--paper) 0%,var(--paper-2) 100%)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:34px;position:relative}
.steps::before{
  content:"";position:absolute;top:29px;left:12%;right:12%;height:1px;
  background:repeating-linear-gradient(90deg,var(--gold) 0 8px,transparent 8px 16px);opacity:.55;
}
.step{position:relative;text-align:left}
.step-dot{
  width:58px;height:58px;border-radius:50%;background:var(--paper);
  border:1px solid var(--gold);display:flex;align-items:center;justify-content:center;
  font-size:19px;color:var(--gold-deep);position:relative;z-index:1;margin-bottom:26px;
  font-weight:700;
}
.step h3{font-size:19px;letter-spacing:.08em;margin-bottom:12px}
.step h3 small{display:block;font-size:12px;color:var(--gold);letter-spacing:.3em;margin-bottom:6px;font-weight:400}
.step p{font-size:14.5px;color:var(--ink-soft)}
.step p b{color:var(--ink)}
.how-note{
  margin-top:66px;text-align:center;font-size:14px;color:var(--ink-faint);letter-spacing:.14em;
}
.how-note b{color:var(--gold-deep)}

/* AI 与云端档案展示带 */
.ai-head{text-align:center;margin-top:90px;margin-bottom:42px}
.ai-head h3{font-size:24px;letter-spacing:.1em;margin-top:16px}
.ai-head p{font-size:14.5px;color:var(--ink-soft);margin-top:10px;letter-spacing:.04em}
.ai-band{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--paper-3);border:1px solid var(--paper-3)}
.ai-cell{background:#fbf8f0;padding:36px 32px;transition:background .4s ease}
.ai-cell:hover{background:#fdfbf5}
.ai-cell .t{font-size:12px;letter-spacing:.3em;color:var(--gold-deep);margin-bottom:14px}
.ai-cell h4{font-size:18px;letter-spacing:.04em;margin-bottom:10px}
.ai-cell p{font-size:13.5px;color:var(--ink-soft)}

/* ========== 叁 差异化（暗色） ========== */
.dark{background:
  radial-gradient(ellipse 800px 420px at 50% 0%,rgba(168,131,79,.14),transparent 65%),
  var(--dark);color:var(--dark-text)}
.diff-grid{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid rgba(201,168,106,.28)}
.diff-item{
  padding:52px 46px;border:1px solid rgba(201,168,106,.18);margin:-1px 0 0 -1px;
  transition:background .4s ease;
}
.diff-item:hover{background:rgba(201,168,106,.06)}
.diff-item .k{font-size:12px;letter-spacing:.34em;color:var(--gold-light);margin-bottom:18px}
.diff-item h3{font-size:20px;letter-spacing:.05em;margin-bottom:16px;color:var(--dark-text)}
.diff-item p{font-size:14.5px;color:var(--dark-muted);line-height:2}
.diff-item p b{color:var(--dark-text)}
.diff-quote{
  margin-top:64px;text-align:center;font-size:20px;letter-spacing:.14em;color:var(--gold-light);
}
.diff-quote::before,.diff-quote::after{content:"—";margin:0 18px;opacity:.5}

/* ========== 肆 创始人 ========== */
.founder-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;align-items:center}
.founder-visual{position:relative;display:flex;justify-content:center}
.founder-portrait{
  position:relative;width:300px;height:400px;
  background:linear-gradient(160deg,#e9dfc9,#d9cbab);
  border:1px solid var(--gold-light);display:flex;align-items:center;justify-content:center;
  box-shadow:0 30px 60px -24px rgba(90,74,52,.4);
}
.founder-portrait::before{content:"";position:absolute;inset:12px;border:1px solid rgba(168,131,79,.45)}
.founder-monogram{
  font-size:130px;font-weight:700;color:var(--seal);opacity:.9;letter-spacing:0;
  text-shadow:0 2px 3px rgba(158,59,44,.2);
}
.founder-portrait .v-caption{
  position:absolute;right:-52px;top:50%;transform:translateY(-50%) ;
  writing-mode:vertical-rl;letter-spacing:.5em;font-size:13px;color:var(--ink-faint);
  border-left:1px solid rgba(168,131,79,.4);padding-left:14px;white-space:nowrap;
}
.founder-portrait img{width:100%;height:100%;object-fit:cover;object-position:top center;display:block}
.founder-seal{position:absolute;bottom:-24px;right:22px}
.founder-body .role{
  font-size:13px;letter-spacing:.32em;color:var(--gold-deep);margin-bottom:14px;
}
.founder-body h3{font-size:38px;letter-spacing:.1em;font-weight:700;margin-bottom:6px}
.founder-body .title{font-size:15px;color:var(--ink-faint);letter-spacing:.14em;margin-bottom:30px}
.founder-body .bio p{color:var(--ink-soft);font-size:15.5px;margin-bottom:16px}
.founder-body .bio b{color:var(--ink)}
.creds{
  display:grid;grid-template-columns:1fr 1fr;gap:12px 26px;margin-top:32px;
}
.creds li{
  list-style:none;font-size:14px;color:var(--ink-soft);letter-spacing:.04em;
  padding-left:22px;position:relative;
}
.creds li::before{content:"";position:absolute;left:0;top:.72em;width:9px;height:9px;
  background:var(--seal);transform:rotate(45deg) scale(.8)}
.founder-quote{
  margin-top:34px;padding:22px 30px;background:var(--paper-2);border-left:3px solid var(--gold);
  font-size:15.5px;color:var(--ink-soft);letter-spacing:.05em;
}
.founder-quote b{color:var(--ink)}

/* ========== 伍 客户故事 ========== */
#cases{background:linear-gradient(180deg,var(--paper-2) 0%,var(--paper) 100%)}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:44px}
.case-card{display:flex;flex-direction:column}
.case-cover{
  position:relative;aspect-ratio:3/4.1;border-radius:3px 6px 6px 3px;overflow:hidden;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 24px 48px -20px rgba(42,37,33,.45);
  transition:transform .45s ease;
}
.case-card:hover .case-cover{transform:translateY(-8px) rotate(-.6deg)}
.case-cover .inner{
  position:absolute;inset:16px;border:1px solid rgba(220,195,150,.55);
  display:flex;align-items:center;justify-content:center;
}
.case-cover .ct{
  writing-mode:vertical-rl;font-size:30px;font-weight:700;letter-spacing:.4em;
}
.case-cover .meta{
  position:absolute;bottom:30px;left:0;right:0;text-align:center;
  font-size:10px;letter-spacing:.36em;opacity:.8;
}
.case-cover .seal{position:absolute;top:26px;right:24px;width:22px;height:38px;font-size:8px;opacity:.92}
/* 三本书不同气质 */
.cv-a{background:linear-gradient(160deg,#26313c 0%,#131b23 100%)}
.cv-a .ct{color:#d9b878}
.cv-a .meta{color:#9db0bf}
.cv-a svg{position:absolute;bottom:0;left:0;width:100%;opacity:.5}
.cv-b{background:linear-gradient(160deg,#f2ecdd,#e3d9c2)}
.cv-b .ct{color:var(--seal)}
.cv-b .meta{color:#9a8a6c}
.cv-b .chalk{position:absolute;inset:0;
  background-image:radial-gradient(circle,rgba(90,80,60,.14) 1px,transparent 1.4px);
  background-size:26px 26px}
.cv-c{background:linear-gradient(160deg,#33392a,#171c11)}
.cv-c .ct{color:#cbd3a8}
.cv-c .meta{color:#a3ab88}
.cv-c svg{position:absolute;bottom:0;left:0;width:100%;opacity:.45}
.case-info{padding-top:26px;flex:1;display:flex;flex-direction:column}
.case-info .who{font-size:13px;color:var(--gold-deep);letter-spacing:.18em;margin-bottom:10px}
.case-info p{font-size:14.5px;color:var(--ink-soft);margin-bottom:14px}
.case-info p b{color:var(--ink)}
.case-say{
  margin-top:auto;padding:14px 18px;background:#fbf8f0;border-left:2px solid var(--seal);
  font-size:13.5px;color:var(--ink-soft);
}
.case-say b{color:var(--seal)}
.cases-note{
  margin-top:56px;text-align:center;font-size:12.5px;color:var(--ink-faint);letter-spacing:.16em;
}

/* ========== 陆 价格 ========== */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;align-items:stretch}
.price-card{
  background:#fbf8f0;border:1px solid var(--paper-3);padding:46px 38px;
  display:flex;flex-direction:column;position:relative;
  transition:transform .4s ease,box-shadow .4s ease;
}
.price-card:hover{transform:translateY(-6px);box-shadow:0 26px 50px -24px rgba(90,74,52,.3)}
.price-card .tier{font-size:13px;letter-spacing:.34em;color:var(--gold-deep)}
.price-card .fit{font-size:13px;color:var(--ink-faint);margin-top:8px;letter-spacing:.06em;min-height:44px}
.price-num{
  font-size:44px;font-weight:700;margin:20px 0 4px;letter-spacing:.02em;color:var(--ink);
}
.price-num small{font-size:15px;font-weight:400;color:var(--ink-faint);letter-spacing:.1em}
.price-line{height:1px;background:var(--paper-3);margin:24px 0}
.price-card ul{list-style:none;flex:1}
.price-card li{
  font-size:14px;color:var(--ink-soft);padding:9px 0 9px 26px;position:relative;letter-spacing:.02em;
}
.price-card li::before{
  content:"";position:absolute;left:2px;top:1.05em;width:8px;height:5px;
  border-left:1.5px solid var(--gold);border-bottom:1.5px solid var(--gold);
  transform:rotate(-45deg);
}
.price-card li b{color:var(--ink)}
.price-card .btn{margin-top:30px;text-align:center}
.price-featured{
  background:var(--dark);border-color:var(--gold);color:var(--dark-text);
  transform:scale(1.035);z-index:2;
  box-shadow:0 30px 60px -22px rgba(42,37,33,.5);
}
.price-featured:hover{transform:scale(1.035) translateY(-6px)}
.price-featured .tier{color:var(--gold-light)}
.price-featured .fit{color:var(--dark-muted)}
.price-featured .price-num{color:var(--dark-text)}
.price-featured .price-num small{color:var(--dark-muted)}
.price-featured .price-line{background:rgba(201,168,106,.25)}
.price-featured li{color:var(--dark-muted)}
.price-featured li b{color:var(--dark-text)}
.price-featured .btn{border-color:var(--gold);background:var(--gold);color:#fff}
.price-featured .btn:hover{background:var(--gold-deep);border-color:var(--gold-deep)}
.price-badge{
  position:absolute;top:-15px;left:50%;transform:translateX(-50%);
  background:var(--seal);color:#f7ecdd;font-size:11.5px;letter-spacing:.3em;
  padding:7px 22px 7px 26px;white-space:nowrap;
}
.price-note{
  margin-top:56px;text-align:center;font-size:13.5px;color:var(--ink-faint);letter-spacing:.1em;
}
.price-note b{color:var(--gold-deep)}

/* ========== 柒 FAQ ========== */
#faq{background:var(--paper-2)}
.faq-list{max-width:780px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--paper-3)}
.faq-item:first-child{border-top:1px solid var(--paper-3)}
.faq-q{
  width:100%;background:none;border:none;font-family:var(--serif);text-align:left;
  padding:26px 8px;font-size:17px;letter-spacing:.04em;color:var(--ink);cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;gap:20px;
  transition:color .3s;
}
.faq-q:hover{color:var(--gold-deep)}
.faq-q .ic{
  flex:none;width:26px;height:26px;border:1px solid var(--gold);border-radius:50%;
  position:relative;transition:transform .4s ease,background .3s;
}
.faq-q .ic::before,.faq-q .ic::after{
  content:"";position:absolute;top:50%;left:50%;background:var(--gold-deep);
  transform:translate(-50%,-50%);
}
.faq-q .ic::before{width:10px;height:1.5px}
.faq-q .ic::after{width:1.5px;height:10px;transition:opacity .3s}
.faq-item.open .ic{transform:rotate(180deg);background:var(--gold)}
.faq-item.open .ic::before,.faq-item.open .ic::after{background:#fff}
.faq-item.open .ic::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .5s ease}
.faq-a p{
  padding:0 8px 30px;font-size:15px;color:var(--ink-soft);max-width:660px;
}
.faq-a b{color:var(--ink)}

/* ========== 联系 ========== */
#contact{background:
  radial-gradient(ellipse 900px 460px at 50% 110%,rgba(201,168,106,.16),transparent 65%),
  var(--dark);color:var(--dark-text);text-align:center;padding:130px 0}
#contact .k{font-size:13px;letter-spacing:.4em;color:var(--gold-light);margin-bottom:26px}
#contact h2{font-size:clamp(28px,4vw,42px);letter-spacing:.08em;line-height:1.6;font-weight:700}
#contact h2 em{font-style:normal;color:var(--gold-light)}
#contact .sub{margin-top:22px;color:var(--dark-muted);font-size:16px;letter-spacing:.06em}
.contact-ctas{display:flex;gap:20px;justify-content:center;margin-top:46px;flex-wrap:wrap}
.contact-info{
  margin-top:52px;display:flex;gap:56px;justify-content:center;flex-wrap:wrap;
  font-size:14px;color:var(--dark-muted);letter-spacing:.08em;
}
.contact-info span b{color:var(--dark-text);font-weight:700}

/* ========== 页脚 ========== */
footer{background:#1d1812;color:#8f8471;padding:44px 0;font-size:13px}
.foot-inner{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;letter-spacing:.1em}
.foot-brand{display:flex;align-items:center;gap:12px;color:#c9bda4}
.foot-links{display:flex;gap:26px}
.foot-links a:hover{color:var(--gold-light)}
.foot-motto{color:#7a705e;letter-spacing:.3em;font-size:12px}

/* ========== 响应式 ========== */
@media(max-width:1020px){
  .hero-grid{grid-template-columns:1fr;gap:70px;text-align:center}
  .hero-sub{margin-left:auto;margin-right:auto}
  .hero-ctas{justify-content:center}
  .hero-eyebrow{justify-content:center}
  .hero-eyebrow::before{display:none}
  .v-caption{display:none}
  .book-tag{margin-top:56px}
  .founder-grid{grid-template-columns:1fr;gap:80px;text-align:center}
  .founder-body .bio p{text-align:left}
  .creds{text-align:left}
  .founder-quote{text-align:left}
  .case-grid{grid-template-columns:1fr;max-width:430px;margin:0 auto}
  .price-grid{grid-template-columns:1fr;max-width:460px;margin:0 auto}
  .price-featured{transform:none}
  .price-featured:hover{transform:translateY(-6px)}
}
@media(max-width:860px){
  .nav-links{display:none}
  .sec{padding:80px 0}
  .why-grid{grid-template-columns:1fr}
  .diff-grid{grid-template-columns:1fr}
  .ai-band{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr;gap:44px 26px}
  .steps::before{display:none}
  .step{display:flex;gap:18px;align-items:flex-start}
  .step-dot{margin-bottom:0;flex:none;width:48px;height:48px;font-size:16px}
  .step h3 small{margin-bottom:2px}
  .contact-info{gap:20px}
}
@media(max-width:560px){
  .steps{grid-template-columns:1fr}
  .why-card{padding:34px 26px}
  .diff-item{padding:36px 26px}
  .founder-portrait{width:250px;height:340px}
  .hero h1{letter-spacing:.02em}
  .hero-ctas .btn{padding:13px 26px;font-size:14px}
}
/* 减少动态 */
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* ========== 文章页 / 栏目页（追加） ========== */
.art-head{padding:132px 0 46px;text-align:center}
.art-kicker{font-size:12px;letter-spacing:.4em;color:var(--gold);margin-bottom:20px}
.art-title{font-family:var(--serif);font-size:clamp(24px,3.4vw,36px);line-height:1.55;color:var(--ink);letter-spacing:.03em;font-weight:400}
.art-meta{margin-top:22px;font-size:13px;color:var(--ink-faint);letter-spacing:.12em;display:flex;gap:20px;justify-content:center;flex-wrap:wrap}
.art-rule{width:70px;height:1px;background:var(--gold);margin:34px auto 0;opacity:.6}
.art-body{max-width:720px;margin:0 auto;padding:8px 0 30px;font-size:16px;line-height:2.08;color:var(--ink-soft);letter-spacing:.02em}
.art-body p{margin:22px 0}
.art-body h2{font-family:var(--serif);font-size:22px;font-weight:400;color:var(--ink);letter-spacing:.04em;margin:54px 0 18px;line-height:1.6}
.art-body h3{font-family:var(--serif);font-size:18px;font-weight:400;color:var(--ink);letter-spacing:.04em;margin:38px 0 14px;line-height:1.6}
.art-body ul,.art-body ol{margin:22px 0;padding-left:24px}
.art-body li{margin:11px 0}
.art-body b{color:var(--ink)}
.art-body blockquote{margin:32px 0;padding:2px 0 2px 22px;border-left:3px solid var(--gold);color:var(--ink-soft)}
.art-body hr{border:0;height:1px;background:var(--paper-3);margin:48px 0}
.art-cta{margin:56px 0 10px;padding:34px 30px;background:var(--paper-2);text-align:center;border:1px solid var(--paper-3)}
.art-cta p{font-size:15px;color:var(--ink-soft);line-height:1.9;margin-bottom:18px}
.cat-block{margin-bottom:56px}
.cat-title{font-family:var(--serif);font-size:19px;color:var(--ink);letter-spacing:.06em;margin:0 0 6px;font-weight:400}
.cat-desc{font-size:13.5px;color:var(--ink-faint);line-height:1.8;margin-bottom:22px}
.art-card{display:block;padding:26px 0;border-top:1px solid var(--paper-3);text-decoration:none;color:inherit;transition:background .3s}
.art-card:last-child{border-bottom:1px solid var(--paper-3)}
.art-card:hover{background:var(--paper-2)}
.art-card h3{font-family:var(--serif);font-size:18px;font-weight:400;color:var(--ink);letter-spacing:.03em;margin-bottom:10px;line-height:1.6}
.art-card .ex{font-size:14px;color:var(--ink-faint);line-height:1.85;margin-bottom:12px}
.art-card .dt{font-size:12px;color:var(--gold);letter-spacing:.12em}
.art-empty{padding:22px 0;font-size:13.5px;color:var(--ink-faint);border-top:1px solid var(--paper-3);border-bottom:1px solid var(--paper-3)}
.crumb{font-size:12px;color:var(--ink-faint);letter-spacing:.1em;padding:104px 0 0}
.crumb a{color:var(--ink-faint);text-decoration:none}
.crumb a:hover{color:var(--gold-deep)}
@media(max-width:860px){
  .art-head{padding:104px 0 34px}
  .crumb{padding:84px 0 0}
}