/* =========================================================
   竺子品牌设计官网 · 设计系统
   视觉基调：墨黑 + 米白 + 低饱和朱红(#B23A2E)
   排版语言：作品集 / 编辑刊物感 · 大面积留白 · 作品主视觉为画面主角
   响应式：桌面 / 平板(≤1024) / 移动(≤768)
   ========================================================= */

:root{
  --ink:#16130F;          /* 墨黑（偏暖） */
  --ink-soft:#2A2520;
  --paper:#F6F2E9;        /* 米白 */
  --paper-2:#EDE6D8;      /* 米白深一档 */
  --paper-3:#E3DAC9;
  --accent:#B23A2E;       /* 低饱和朱红 */
  --accent-deep:#8F2D23;
  --muted:#6E655A;        /* 次级文字 */
  --muted-2:#9A9183;
  --line:rgba(22,19,15,.12);
  --line-strong:rgba(22,19,15,.22);
  --white:#FCFAF5;

  --font-serif:"Source Han Serif SC","Noto Serif SC","Songti SC","STSong","SimSun",serif;
  --font-sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;

  --container:1240px;
  --gap:clamp(20px,4vw,56px);
  --section-y:clamp(64px,9vw,140px);
  --radius:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-sans);
  color:var(--ink);
  background:var(--paper);
  line-height:1.75;
  font-size:16px;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
ul{margin:0;padding:0;list-style:none;}

/* ---------- 布局容器 ---------- */
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:clamp(20px,5vw,48px);}

/* ---------- 排版 ---------- */
h1,h2,h3,h4{font-family:var(--font-serif);font-weight:600;line-height:1.18;margin:0;letter-spacing:.01em;}
p{margin:0;}
.eyebrow{
  font-family:var(--font-sans);
  font-size:13px;letter-spacing:.32em;text-transform:uppercase;
  color:var(--accent);font-weight:600;margin-bottom:18px;
  display:inline-flex;align-items:center;gap:12px;
}
.eyebrow::before{content:"";width:28px;height:1px;background:var(--accent);display:inline-block;}
.section-title{font-size:clamp(28px,4.4vw,52px);color:var(--ink);}
.section-lead{color:var(--muted);font-size:clamp(15px,1.6vw,18px);max-width:60ch;margin-top:18px;line-height:1.85;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 28px;font-size:15px;font-weight:600;letter-spacing:.04em;
  border:1px solid var(--ink);background:transparent;color:var(--ink);
  border-radius:var(--radius);transition:.35s var(--ease);white-space:nowrap;
}
.btn:hover{background:var(--ink);color:var(--paper);}
.btn .arrow{transition:transform .35s var(--ease);}
.btn:hover .arrow{transform:translateX(5px);}
.btn-accent{background:var(--accent);border-color:var(--accent);color:#fff;}
.btn-accent:hover{background:var(--accent-deep);border-color:var(--accent-deep);color:#fff;}
.btn-ghost{border-color:var(--line-strong);}
.btn-ghost:hover{background:transparent;border-color:var(--ink);}

/* ---------- 头部 / 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:transparent;transition:background .4s var(--ease),box-shadow .4s var(--ease),padding .4s var(--ease);
  padding:26px 0;
}
.site-header.scrolled{
  background:rgba(246,242,233,.92);
  backdrop-filter:saturate(140%) blur(10px);
  box-shadow:0 1px 0 var(--line);
  padding:14px 0;
}
/* 顶部为深色 Hero：未滚动时导航用浅色，滚动收窄后转深色 */
.site-header:not(.scrolled) .brand,
.site-header:not(.scrolled) .nav-links a,
.site-header:not(.scrolled) .phone-btn{color:var(--paper);}
.site-header:not(.scrolled) .phone-btn{border-color:rgba(246,242,233,.4);}
.site-header:not(.scrolled) .nav-toggle span{background:var(--paper);}
.site-header:not(.scrolled) .brand small{color:rgba(246,242,233,.6);}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;}
.brand{font-family:var(--font-serif);font-size:22px;font-weight:600;letter-spacing:.06em;color:var(--ink);white-space:nowrap;}
.brand small{display:block;font-family:var(--font-sans);font-size:11px;letter-spacing:.28em;color:var(--muted);font-weight:500;margin-top:2px;}
.nav-links{display:flex;align-items:center;gap:34px;}
.nav-links a{
  position:relative;font-size:15px;color:var(--ink);padding:6px 0;font-weight:500;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;background:var(--accent);
  transition:width .35s var(--ease);
}
.nav-links a:hover::after,.nav-links a.active::after{width:100%;}
.nav-cta{display:flex;align-items:center;gap:14px;}
.phone-btn{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;
  border:1px solid var(--line-strong);padding:9px 16px;border-radius:var(--radius);
  transition:.3s var(--ease);
}
.phone-btn:hover{border-color:var(--accent);color:var(--accent);}
.phone-btn .dot{width:7px;height:7px;border-radius:50%;background:var(--accent);}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;padding:8px;}
.nav-toggle span{width:24px;height:2px;background:var(--ink);transition:.3s var(--ease);}

/* 移动端菜单 */
.mobile-menu{
  position:fixed;inset:0;z-index:99;background:var(--paper);
  display:flex;flex-direction:column;justify-content:center;gap:8px;padding:0 32px;
  transform:translateY(-100%);transition:transform .45s var(--ease);visibility:hidden;
}
.mobile-menu.open{transform:translateY(0);visibility:visible;}
.mobile-menu a{font-family:var(--font-serif);font-size:30px;padding:14px 0;border-bottom:1px solid var(--line);}
.mobile-menu .phone-btn{margin-top:24px;align-self:flex-start;font-size:18px;padding:14px 22px;}

/* ---------- 区块通用 ---------- */
section{padding-block:var(--section-y);}
.section-head{margin-bottom:clamp(36px,5vw,68px);}
.section-head.center{text-align:center;}
.section-head.center .eyebrow{justify-content:center;}

/* ---------- HERO 首屏 ---------- */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:flex-end;
  padding-top:140px;padding-bottom:clamp(48px,7vw,90px);
  background:var(--ink);color:var(--paper);overflow:hidden;
}
.hero-bg{position:absolute;inset:0;}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.46;filter:grayscale(.15) contrast(1.02);}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(22,19,15,.55) 0%,rgba(22,19,15,.25) 35%,rgba(22,19,15,.85) 100%);}
.hero .container{position:relative;z-index:2;width:100%;}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(24px,5vw,72px);align-items:end;}
.hero-eyebrow{color:#E7B7AE;font-family:var(--font-sans);font-size:13px;letter-spacing:.32em;text-transform:uppercase;font-weight:600;margin-bottom:24px;display:inline-flex;align-items:center;gap:12px;}
.hero-eyebrow::before{content:"";width:28px;height:1px;background:#E7B7AE;}
.hero h1{font-size:clamp(40px,7.4vw,92px);line-height:1.04;color:#fff;font-weight:600;letter-spacing:.01em;}
.hero h1 .line{display:block;overflow:hidden;}
.hero h1 .line span{display:block;transform:translateY(110%);animation:rise .9s var(--ease) forwards;}
.hero h1 .line:nth-child(2) span{animation-delay:.12s;}
.hero h1 .line:nth-child(3) span{animation-delay:.24s;}
.hero h1 .accent{color:var(--accent);}
@keyframes rise{to{transform:translateY(0);}}
.hero-sub{color:rgba(246,242,233,.82);font-size:clamp(16px,1.8vw,20px);max-width:46ch;margin-top:28px;line-height:1.9;}
.hero-actions{display:flex;gap:16px;margin-top:40px;flex-wrap:wrap;}
.hero .btn{border-color:rgba(246,242,233,.5);color:var(--paper);}
.hero .btn:hover{background:var(--paper);color:var(--ink);border-color:var(--paper);}
.hero .btn-accent{background:var(--accent);border-color:var(--accent);color:#fff;}
.hero .btn-accent:hover{background:var(--accent-deep);border-color:var(--accent-deep);color:#fff;}
.hero-side{display:flex;flex-direction:column;gap:18px;}
.hero-stat{border-top:1px solid rgba(246,242,233,.22);padding-top:14px;}
.hero-stat .num{font-family:var(--font-serif);font-size:34px;color:#fff;}
.hero-stat .lbl{font-size:13px;color:rgba(246,242,233,.6);letter-spacing:.06em;}
.scroll-hint{position:absolute;left:50%;bottom:26px;transform:translateX(-50%);z-index:3;color:rgba(246,242,233,.6);font-size:12px;letter-spacing:.3em;display:flex;flex-direction:column;align-items:center;gap:8px;}
.scroll-hint .bar{width:1px;height:34px;background:linear-gradient(rgba(246,242,233,.6),transparent);animation:scrolly 1.8s var(--ease) infinite;}
@keyframes scrolly{0%{transform:scaleY(0);transform-origin:top;}50%{transform:scaleY(1);transform-origin:top;}50.1%{transform-origin:bottom;}100%{transform:scaleY(0);transform-origin:bottom;}}

/* ---------- 信任背书墙 ---------- */
.trust{background:var(--paper);}
.client-wall{position:relative;overflow:hidden;border-block:1px solid var(--line);padding-block:8px;margin-bottom:30px;-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);}
.client-track{display:flex;gap:0;width:max-content;animation:marquee 38s linear infinite;}
.client-wall:hover .client-track{animation-play-state:paused;}
.client-track span{
  font-family:var(--font-serif);font-size:clamp(20px,2.4vw,30px);color:var(--ink-soft);
  padding-inline:clamp(22px,3vw,42px);white-space:nowrap;opacity:.9;
}
.client-track span::after{content:"·";margin-left:clamp(22px,3vw,42px);color:var(--accent);}
@keyframes marquee{to{transform:translateX(-50%);}}
.award-bar{display:flex;flex-wrap:wrap;gap:10px 14px;justify-content:center;align-items:center;}
.award-bar .award{
  font-size:13px;letter-spacing:.04em;color:var(--muted);border:1px solid var(--line);
  padding:8px 16px;border-radius:40px;cursor:default;transition:.3s var(--ease);position:relative;
}
.award-bar .award:hover{color:var(--accent);border-color:var(--accent);}
.award-bar .award[data-tip]:hover::after{
  content:attr(data-tip);position:absolute;left:50%;bottom:calc(100% + 10px);transform:translateX(-50%);
  background:var(--ink);color:var(--paper);font-size:12px;padding:8px 12px;border-radius:4px;white-space:nowrap;
}

/* ---------- 核心差异化优势 ---------- */
.advantages{background:var(--paper-2);}
.adv-list{display:grid;gap:0;}
.adv-item{
  display:grid;grid-template-columns:120px 1fr;gap:clamp(20px,4vw,60px);
  padding:clamp(28px,4vw,46px) 0;border-top:1px solid var(--line);align-items:start;
}
.adv-item:last-child{border-bottom:1px solid var(--line);}
.adv-no{font-family:var(--font-serif);font-size:clamp(34px,5vw,64px);color:var(--accent);line-height:1;transition:transform .4s var(--ease);}
.adv-item:hover .adv-no{transform:translateX(8px);}
.adv-title{font-size:clamp(20px,2.6vw,30px);margin-bottom:14px;}
.adv-desc{color:var(--muted);max-width:62ch;line-height:1.9;}

/* ---------- 服务矩阵 ---------- */
.svc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);}
.svc-card{background:var(--paper);padding:clamp(26px,3vw,38px);display:flex;flex-direction:column;gap:16px;transition:.4s var(--ease);min-height:280px;}
.svc-card:hover{background:var(--white);transform:translateY(-6px);box-shadow:0 18px 40px -24px rgba(22,19,15,.35);}
.svc-no{font-family:var(--font-serif);font-size:15px;color:var(--accent);letter-spacing:.1em;}
.svc-card h3{font-size:22px;}
.svc-card p{color:var(--muted);font-size:14.5px;line-height:1.8;flex:1;}
.svc-card .more{font-size:14px;font-weight:600;color:var(--ink);display:inline-flex;gap:8px;align-items:center;}
.svc-card .more .arrow{transition:transform .35s var(--ease);}
.svc-card:hover .more .arrow{transform:translateX(5px);color:var(--accent);}

/* ---------- 案例网格 ---------- */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(16px,2vw,28px);}
.case-card{position:relative;display:block;background:var(--white);border:1px solid var(--line);overflow:hidden;transition:.45s var(--ease);}
.case-card:hover{transform:translateY(-6px);box-shadow:0 22px 48px -26px rgba(22,19,15,.4);border-color:var(--line-strong);}
.case-thumb{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--paper-2);}
.case-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .7s var(--ease);}
.case-card:hover .case-thumb img{transform:scale(1.06);}
.case-tag{position:absolute;top:14px;left:14px;background:rgba(22,19,15,.78);color:var(--paper);font-size:12px;letter-spacing:.08em;padding:6px 12px;border-radius:2px;backdrop-filter:blur(2px);}
.case-cover-overlay{position:absolute;inset:0;background:rgba(22,19,15,.0);display:flex;align-items:flex-end;justify-content:center;opacity:0;transition:.4s var(--ease);}
.case-card:hover .case-cover-overlay{opacity:1;background:rgba(22,19,15,.28);}
.case-cover-overlay span{color:#fff;font-weight:600;margin-bottom:24px;border:1px solid rgba(255,255,255,.7);padding:10px 20px;border-radius:2px;transform:translateY(10px);transition:.4s var(--ease);}
.case-card:hover .case-cover-overlay span{transform:translateY(0);}
.case-body{padding:22px 22px 26px;}
.case-body .brand-name{font-family:var(--font-serif);font-size:21px;margin-bottom:8px;}
.case-body .claim{color:var(--muted);font-size:14.5px;line-height:1.7;}
.case-skeleton .case-thumb{display:flex;align-items:center;justify-content:center;}
.case-skeleton .case-thumb .ph{font-size:13px;color:var(--muted-2);letter-spacing:.1em;}

/* 行业筛选 chips */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:40px;}
.chip{
  font-size:14px;padding:9px 20px;border:1px solid var(--line-strong);border-radius:40px;
  background:transparent;color:var(--ink);transition:.3s var(--ease);
}
.chip:hover{border-color:var(--ink);}
.chip.active{background:var(--ink);color:var(--paper);border-color:var(--ink);}
.result-count{color:var(--muted);font-size:14px;margin-bottom:24px;}
.empty-state{padding:80px 0;text-align:center;color:var(--muted);border:1px dashed var(--line-strong);}
.empty-state h3{font-family:var(--font-serif);font-size:22px;color:var(--ink-soft);margin-bottom:10px;}

/* 通栏 CTA */
.cta-band{background:var(--ink);color:var(--paper);text-align:center;padding-block:clamp(56px,8vw,110px);}
.cta-band h2{color:#fff;font-size:clamp(26px,4vw,46px);max-width:20ch;margin-inline:auto;line-height:1.25;}
.cta-band p{color:rgba(246,242,233,.7);margin-top:18px;font-size:17px;}
.cta-band .hero-actions{justify-content:center;margin-top:36px;}

/* ---------- 创始人 / 团队 ---------- */
.founder{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(30px,5vw,72px);align-items:center;}
.founder-portrait{position:relative;aspect-ratio:4/5;background:var(--paper-2);overflow:hidden;border:1px solid var(--line);}
.founder-portrait img{width:100%;height:100%;object-fit:cover;}
.founder-portrait .ph{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:var(--muted-2);font-size:14px;letter-spacing:.1em;}
.founder-bio h2{font-size:clamp(26px,3.4vw,40px);margin-bottom:8px;}
.founder-bio .role{color:var(--accent);font-weight:600;letter-spacing:.06em;margin-bottom:22px;font-size:15px;}
.founder-bio p{color:var(--muted);line-height:1.95;margin-bottom:16px;}
.team-roles{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:30px;}
.team-role{background:var(--paper);padding:24px;}
.team-role .t{font-family:var(--font-serif);font-size:18px;margin-bottom:8px;}
.team-role .d{font-size:13.5px;color:var(--muted);line-height:1.7;}

/* ---------- 合作流程 ---------- */
.process{background:var(--paper-2);}
.process-track{display:grid;grid-template-columns:repeat(6,1fr);gap:0;position:relative;}
.process-track::before{content:"";position:absolute;top:18px;left:0;right:0;height:1px;background:var(--line-strong);}
.proc-step{position:relative;padding-top:48px;text-align:center;}
.proc-step .node{width:14px;height:14px;border-radius:50%;background:var(--paper-2);border:2px solid var(--accent);position:absolute;top:11px;left:50%;transform:translateX(-50%);transition:.4s var(--ease);}
.proc-step.reached .node{background:var(--accent);}
.proc-step .no{font-family:var(--font-serif);font-size:14px;color:var(--accent);}
.proc-step h4{font-size:18px;margin:8px 0 8px;font-family:var(--font-sans);font-weight:600;}
.proc-step p{font-size:13px;color:var(--muted);line-height:1.7;padding-inline:8px;}

/* ---------- 咨询表单 ---------- */
.contact-split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,5vw,72px);align-items:start;}
.form-card{background:var(--white);border:1px solid var(--line);padding:clamp(28px,3.4vw,44px);}
.field{margin-bottom:22px;}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:9px;}
.field label .req{color:var(--accent);}
.field input,.field textarea,.field select{
  width:100%;font-family:inherit;font-size:15px;color:var(--ink);
  border:1px solid var(--line-strong);background:var(--paper);padding:13px 14px;border-radius:var(--radius);
  transition:.3s var(--ease);
}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--accent);background:var(--white);}
.field textarea{resize:vertical;min-height:120px;}
.field .err{color:var(--accent);font-size:12.5px;margin-top:6px;display:none;}
.field.invalid input,.field.invalid textarea,.field.invalid select{border-color:var(--accent);}
.field.invalid .err{display:block;}
.form-note{font-size:12.5px;color:var(--muted-2);margin-top:6px;}
.form-success{display:none;background:rgba(178,58,46,.08);border:1px solid var(--accent);color:var(--accent-deep);padding:18px;border-radius:var(--radius);margin-top:18px;font-weight:600;}
.form-success.show{display:block;}
.form-fail{display:none;background:var(--paper-2);border:1px solid var(--line-strong);color:var(--ink-soft);padding:18px;border-radius:var(--radius);margin-top:18px;}
.form-fail.show{display:block;}

.contact-info .info-block{margin-bottom:34px;}
.contact-info .info-block .k{font-size:13px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin-bottom:10px;}
.contact-info .info-block .v{font-family:var(--font-serif);font-size:22px;line-height:1.5;}
.contact-info .info-block .v a:hover{color:var(--accent);}
.map-box{aspect-ratio:16/9;background:var(--paper-2);border:1px solid var(--line);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;color:var(--muted);text-align:center;padding:20px;}
.map-box .ph{font-size:13px;letter-spacing:.08em;}
.map-box a{color:var(--accent);font-weight:600;}

/* ---------- 页尾 ---------- */
.site-footer{background:var(--ink);color:rgba(246,242,233,.8);padding-block:clamp(56px,7vw,90px) 36px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.footer-grid .brand{color:#fff;font-size:24px;}
.footer-grid .brand small{color:rgba(246,242,233,.5);}
.footer-about{color:rgba(246,242,233,.6);font-size:14px;line-height:1.9;max-width:34ch;margin-top:18px;}
.footer-col h4{color:#fff;font-family:var(--font-sans);font-size:14px;letter-spacing:.14em;text-transform:uppercase;margin-bottom:18px;font-weight:600;}
.footer-col a{display:block;color:rgba(246,242,233,.7);font-size:14.5px;padding:7px 0;transition:.3s var(--ease);}
.footer-col a:hover{color:var(--accent);padding-left:6px;}
.footer-contact .v{color:#fff;font-family:var(--font-serif);font-size:18px;}
.footer-bottom{margin-top:clamp(40px,5vw,64px);padding-top:24px;border-top:1px solid rgba(246,242,233,.16);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(246,242,233,.5);}

/* ---------- 通用：区块分隔 ---------- */
.bg-paper{background:var(--paper);}
.bg-paper2{background:var(--paper-2);}
.bg-ink{background:var(--ink);color:var(--paper);}
.bg-ink .section-title,.bg-ink h2,.bg-ink h3{color:#fff;}
.bg-ink .section-lead{color:rgba(246,242,233,.7);}

/* ---------- 详情页 ---------- */
.detail-hero{background:var(--ink);color:var(--paper);padding-top:160px;padding-bottom:60px;}
.detail-hero .meta{display:flex;flex-wrap:wrap;gap:14px 26px;color:rgba(246,242,233,.65);font-size:14px;margin-bottom:24px;}
.detail-hero .meta b{color:#fff;font-weight:600;}
.detail-hero h1{color:#fff;font-size:clamp(32px,5.5vw,64px);}
.detail-claim{font-family:var(--font-serif);font-size:clamp(22px,3.4vw,40px);line-height:1.4;color:var(--ink);padding-block:clamp(48px,7vw,90px);max-width:24ch;}
.detail-section{padding-block:clamp(40px,5vw,70px);border-top:1px solid var(--line);}
.detail-section h2{font-size:clamp(22px,3vw,34px);margin-bottom:24px;}
.detail-section p{color:var(--muted);line-height:2;max-width:68ch;margin-bottom:16px;}
.detail-gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:10px;}
.detail-gallery .g{aspect-ratio:4/3;background:var(--paper-2);overflow:hidden;border:1px solid var(--line);}
.detail-gallery .g img{width:100%;height:100%;object-fit:cover;}
.detail-result{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);}
.detail-result .r{background:var(--paper);padding:30px;text-align:center;}
.detail-result .r .num{font-family:var(--font-serif);font-size:34px;color:var(--accent);}
.detail-result .r .l{font-size:13.5px;color:var(--muted);margin-top:8px;}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}

/* ---------- 关于：时间线 ---------- */
.timeline{position:relative;margin-top:20px;padding-left:0;}
.tl-item{display:grid;grid-template-columns:140px 1fr;gap:clamp(20px,4vw,50px);padding:28px 0;border-top:1px solid var(--line);}
.tl-year{font-family:var(--font-serif);font-size:clamp(26px,3.4vw,40px);color:var(--accent);}
.tl-body h3{font-size:20px;margin-bottom:8px;}
.tl-body p{color:var(--muted);line-height:1.85;}
.honor-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;}
.honor-list .h{display:flex;gap:14px;align-items:baseline;border:1px solid var(--line);padding:18px 20px;background:var(--white);}
.honor-list .h .y{font-family:var(--font-serif);color:var(--accent);font-size:15px;white-space:nowrap;}
.honor-list .h .n{font-size:15px;}

/* ---------- 入场动画 ---------- */
[data-reveal]{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease);}
[data-reveal].in{opacity:1;transform:none;}
[data-reveal-delay="1"]{transition-delay:.08s;}
[data-reveal-delay="2"]{transition-delay:.16s;}
[data-reveal-delay="3"]{transition-delay:.24s;}
[data-reveal-delay="4"]{transition-delay:.32s;}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-side{flex-direction:row;flex-wrap:wrap;}
  .hero-stat{flex:1;min-width:120px;}
  .svc-grid{grid-template-columns:repeat(2,1fr);}
  .case-grid{grid-template-columns:repeat(2,1fr);}
  .founder{grid-template-columns:1fr;}
  .process-track{grid-template-columns:repeat(3,1fr);row-gap:36px;}
  .process-track::before{display:none;}
  .contact-split{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;row-gap:36px;}
  .detail-gallery{grid-template-columns:1fr;}
  .related-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:768px){
  body{font-size:15px;}
  .nav-links,.nav-cta .phone-btn{display:none;}
  .nav-toggle{display:flex;}
  .site-header{padding:16px 0;}
  .hero{padding-top:120px;min-height:auto;}
  .hero h1{font-size:clamp(34px,11vw,56px);}
  .adv-item{grid-template-columns:60px 1fr;gap:18px;}
  .adv-no{font-size:34px;}
  .svc-grid{grid-template-columns:1fr;}
  .case-grid{grid-template-columns:1fr;}
  .team-roles{grid-template-columns:1fr;}
  .process-track{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .detail-result{grid-template-columns:1fr;}
  .related-grid{grid-template-columns:1fr;}
  .honor-list{grid-template-columns:1fr;}
  .tl-item{grid-template-columns:80px 1fr;gap:18px;}
  .cta-band .hero-actions{flex-direction:column;align-items:stretch;}
}

/* 尊重"减少动态偏好" */
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  [data-reveal]{opacity:1;transform:none;}
  .hero h1 .line span{transform:none;}
  .client-track{animation:none;}
}