/* ==========================================================================
   Sour-nova · main.css — 设计系统（tokens + 组件）
   依据: design/20261109_官网功能与内容规划.md §四 视觉规范
   ========================================================================== */

/* ---- 字体：自托管 woff2（latin 子集；zh 页加载 Noto Sans SC 另行扩展） ---- */
@font-face{font-family:'Fraunces';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/fraunces-latin-400.woff2') format('woff2')}
@font-face{font-family:'Fraunces';font-style:normal;font-weight:600;font-display:swap;src:url('../fonts/fraunces-latin-600.woff2') format('woff2')}
@font-face{font-family:'Fraunces';font-style:normal;font-weight:700;font-display:swap;src:url('../fonts/fraunces-latin-700.woff2') format('woff2')}
@font-face{font-family:'Inter';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/inter-latin-400.woff2') format('woff2')}
@font-face{font-family:'Inter';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/inter-latin-500.woff2') format('woff2')}
@font-face{font-family:'Inter';font-style:normal;font-weight:600;font-display:swap;src:url('../fonts/inter-latin-600.woff2') format('woff2')}
@font-face{font-family:'Inter';font-style:normal;font-weight:700;font-display:swap;src:url('../fonts/inter-latin-700.woff2') format('woff2')}

/* ---- 设计 tokens ---- */
:root{
  --ink:#101014;
  --paper:#F7F5F1;
  --nova:#E04E1B;
  --nova-deep:#C44013;
  --graphite:#3C3C42;
  --line:#E3E0D9;
  --line-dark:#2A2A31;
  --font-display:'Fraunces',Georgia,'Times New Roman',serif;
  --font-body:'Inter',-apple-system,'Segoe UI','PingFang SC','Microsoft YaHei','Noto Sans CJK SC',Helvetica,Arial,sans-serif;
  --w-max:1400px;
  --pad:clamp(20px,5vw,72px);
  --sec-gap:clamp(88px,12vh,140px);
  --ease:cubic-bezier(.22,.61,.36,1);
}
/* 中文页排版适配：标题用黑体，不用衬线 */
html[lang="zh"] h1,html[lang="zh"] h2,html[lang="zh"] h3{font-family:var(--font-body);font-weight:600;letter-spacing:0}

/* ---- 基础 ---- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  font-size:17px;line-height:1.7;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}

h1,h2,h3{font-family:var(--font-display);font-weight:600;line-height:1.12;letter-spacing:-.01em}
h1{font-size:clamp(40px,5.6vw,76px)}
h2{font-size:clamp(30px,3.4vw,52px)}
h3{font-size:clamp(20px,1.6vw,24px);font-family:var(--font-body);font-weight:600;letter-spacing:-.01em}

.container{max-width:var(--w-max);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
.section{padding-top:var(--sec-gap);padding-bottom:var(--sec-gap)}
.section + .section{padding-top:0}

/* 章节编号编辑风: 01 — Services */
.eyebrow{
  font-family:var(--font-body);font-size:12px;font-weight:600;
  letter-spacing:.22em;text-transform:uppercase;color:var(--nova);
  display:flex;align-items:center;gap:14px;margin-bottom:22px;
}
.eyebrow::after{content:'';flex:0 0 56px;height:1px;background:currentColor;opacity:.5}
.section-head{max-width:720px;margin-bottom:clamp(36px,5vw,64px)}
.section-head p{margin-top:16px;color:var(--graphite);font-size:18px}

/* ---- 按钮 ---- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-body);font-size:15px;font-weight:600;letter-spacing:.02em;
  padding:15px 30px;border-radius:2px;border:1px solid transparent;
  transition:background-color .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
  cursor:pointer;
}
.btn-primary{background:var(--nova);color:#fff}
.btn-primary:hover{background:var(--nova-deep)}
.btn-outline{border-color:var(--ink);color:var(--ink)}
.btn-outline:hover{background:var(--ink);color:var(--paper)}
.on-dark .btn-outline,.btn-outline.on-dark{border-color:#fff;color:#fff}
.on-dark .btn-outline:hover,.btn-outline.on-dark:hover{background:#fff;color:var(--ink)}
.btn .arrow{transition:transform .25s var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}

/* ---- 顶部导航 ---- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(247,245,241,.88);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header.on-dark-page{background:rgba(16,16,20,.82);border-bottom-color:var(--line-dark)}
.nav{display:flex;align-items:center;gap:32px;height:72px}
.brand{display:inline-flex;align-items:center;gap:1px;font-family:var(--font-body);font-weight:700;font-size:17px;letter-spacing:.08em}
.brand svg{margin:0 5px;flex:none}
.nav-links{display:flex;gap:28px;margin-left:auto}
.nav-links a{font-size:14px;font-weight:500;color:var(--graphite);position:relative;padding:4px 0}
.nav-links a::after{content:'';position:absolute;left:0;bottom:0;width:100%;height:1px;background:var(--nova);transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease)}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:20px}
.lang-switch{font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--graphite)}
.lang-switch .active{color:var(--nova)}
.lang-switch a:hover{color:var(--nova)}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);margin:5px 0;transition:transform .3s var(--ease),opacity .3s var(--ease)}
.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-open .nav-toggle span:nth-child(2){opacity:0}
.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---- Hero ---- */
.hero{
  position:relative;background:var(--ink);color:#F4F2EE;overflow:hidden;
  padding:clamp(110px,16vh,180px) 0 clamp(90px,12vh,130px);
}
.hero::before{ /* 新星微光: 右上角 nova 光晕, 克制 */
  content:'';position:absolute;top:-30%;right:-12%;width:60vw;height:60vw;max-width:900px;max-height:900px;
  background:radial-gradient(circle at center,rgba(224,78,27,.16),transparent 62%);
  pointer-events:none;
}
.hero::after{ /* 织物经纬线纹理 */
  content:'';position:absolute;inset:0;
  background:repeating-linear-gradient(90deg,rgba(255,255,255,.022) 0 1px,transparent 1px 90px),
             repeating-linear-gradient(0deg,rgba(255,255,255,.022) 0 1px,transparent 1px 90px);
  pointer-events:none;
}
.hero .container{position:relative;z-index:2}
.hero-star{position:absolute;z-index:1;right:6vw;top:14%;width:clamp(140px,18vw,300px);opacity:.9;pointer-events:none}
.hero h1{max-width:14ch;margin:20px 0 26px}
.hero h1 em{font-style:normal;font-weight:400;color:var(--nova)}
.hero-sub{max-width:56ch;font-size:clamp(17px,1.35vw,20px);line-height:1.75;color:#C9C6BE}
.hero-ctas{display:flex;flex-wrap:wrap;gap:16px;margin-top:44px}
.hero-chips{display:flex;flex-wrap:wrap;gap:12px;margin-top:clamp(48px,7vh,76px)}
.chip{
  font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:#BDBAB2;border:1px solid var(--line-dark);border-radius:2px;padding:9px 16px;
}
.chip b{color:#F4F2EE;font-weight:600}

/* ---- 品牌引入条 ---- */
.brand-story{border-bottom:1px solid var(--line)}
.brand-story .container{
  display:grid;grid-template-columns:minmax(220px,.9fr) 2fr;gap:clamp(32px,5vw,88px);
  padding-top:clamp(56px,8vh,88px);padding-bottom:clamp(56px,8vh,88px);
  align-items:start;
}
.brand-word{font-family:var(--font-display);font-size:clamp(26px,2.6vw,38px);font-weight:600;line-height:1.25}
.brand-word em{color:var(--nova);font-style:normal;font-weight:400}
.brand-story p{color:var(--graphite);font-size:clamp(16px,1.2vw,19px)}
.brand-story p strong{color:var(--ink)}

/* ---- 服务卡 ---- */
.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.service{
  background:var(--paper);padding:clamp(28px,2.6vw,44px);
  display:flex;flex-direction:column;gap:14px;min-height:320px;
  transition:background-color .3s var(--ease);
}
.service:hover{background:#FFFFFF}
.service .num{font-family:var(--font-display);font-size:15px;font-weight:600;color:var(--nova)}
.service h3{margin-top:2px}
.service p{color:var(--graphite);font-size:15px;line-height:1.7;flex:1}
.service .more{font-size:13px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--ink);display:inline-flex;gap:8px;align-items:center}

/* ---- 五大优势: 编辑排行 ---- */
.strength-list{border-top:1px solid var(--line)}
.strength{
  display:grid;grid-template-columns:110px minmax(180px,.8fr) 2fr;gap:clamp(20px,3vw,48px);
  align-items:baseline;padding:clamp(26px,3.4vh,40px) 0;border-bottom:1px solid var(--line);
}
.strength .big{font-family:var(--font-display);font-size:clamp(30px,3vw,44px);font-weight:700;color:var(--ink);line-height:1}
.strength h3{font-size:clamp(19px,1.5vw,23px)}
.strength p{color:var(--graphite);font-size:16px}
.strength:nth-child(odd) .big{color:var(--nova)}

/* ---- 合作流程 ---- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:clamp(18px,2.4vw,36px);counter-reset:step}
.step{position:relative;padding-top:26px;border-top:1px solid var(--ink)}
.step::before{counter-increment:step;content:'0' counter(step);position:absolute;top:-24px;left:0;font-family:var(--font-display);font-size:15px;font-weight:600;color:var(--nova);background:var(--paper);padding-right:12px}
.step h3{font-size:17px;margin-bottom:8px}
.step p{color:var(--graphite);font-size:14.5px;line-height:1.65}

/* ---- 目标客户 ---- */
.audience-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(18px,2vw,28px)}
.audience{border:1px solid var(--line);padding:clamp(24px,2.2vw,36px);border-radius:2px;background:transparent;transition:border-color .3s var(--ease)}
.audience:hover{border-color:var(--ink)}
.audience svg{margin-bottom:18px}
.audience h3{font-size:17px;margin-bottom:10px}
.audience p{color:var(--graphite);font-size:14.5px;line-height:1.65}

/* ---- CTA / 页脚 ---- */
.cta{background:var(--ink);color:#F4F2EE;position:relative;overflow:hidden}
.cta::before{
  content:'';position:absolute;bottom:-46%;left:-10%;width:52vw;height:52vw;
  background:radial-gradient(circle,rgba(224,78,27,.14),transparent 60%);pointer-events:none;
}
.cta .container{position:relative;z-index:2;padding-top:clamp(84px,12vh,130px);padding-bottom:clamp(84px,12vh,130px)}
.cta h2{max-width:20ch}
.cta h2 em{font-style:normal;font-weight:400;color:var(--nova)}
.cta p{color:#BDBAB2;max-width:52ch;margin-top:18px;font-size:17px}
.cta .hero-ctas{margin-top:40px}

.site-footer{background:var(--ink);color:#8A8780;border-top:1px solid var(--line-dark)}
.footer-inner{display:flex;flex-wrap:wrap;justify-content:space-between;gap:36px;padding-top:52px;padding-bottom:52px}
.footer-brand .brand{color:#F4F2EE}
.footer-brand p{font-size:13px;margin-top:14px;max-width:34ch;line-height:1.7}
.footer-nav{display:flex;gap:clamp(36px,6vw,96px)}
.footer-nav h4{font-family:var(--font-body);font-size:12px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:#F4F2EE;margin-bottom:16px}
.footer-nav a{display:block;font-size:14px;padding:5px 0;color:#8A8780;transition:color .2s}
.footer-nav a:hover{color:#F4F2EE}
.footer-bottom{border-top:1px solid var(--line-dark);padding-top:24px;padding-bottom:24px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:12.5px;letter-spacing:.02em}

/* ---- 动效 ---- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .btn .arrow,.nav-links a::after{transition:none}
}

/* ---- 响应式 ---- */
@media (max-width:1080px){
  .service-grid{grid-template-columns:repeat(2,1fr)}
  .audience-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr);row-gap:44px}
  .nav-links{display:none}
  .nav-open .nav-links{
    display:flex;flex-direction:column;position:absolute;top:72px;left:0;right:0;
    background:var(--paper);border-bottom:1px solid var(--line);padding:18px var(--pad) 26px;gap:18px;
  }
  .nav-toggle{display:block}
  .svc-detail{grid-template-columns:1fr}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .form-grid{grid-template-columns:1fr}
}
@media (max-width:720px){
  body{font-size:16px}
  .brand-story .container{grid-template-columns:1fr}
  .strength{grid-template-columns:1fr;gap:10px}
  .service-grid{grid-template-columns:1fr}
  .audience-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .footer-inner{flex-direction:column}
  .feature-grid{grid-template-columns:1fr}
  .page-hero{padding-top:64px}
}

/* ==========================================================================
   子页组件（v1 页面铺开新增）
   ========================================================================== */

/* ---- 子页页头（浅底） ---- */
.page-hero{padding:clamp(72px,10vh,120px) 0 clamp(48px,7vh,84px);border-bottom:1px solid var(--line)}
.page-hero h1{font-size:clamp(38px,4.8vw,66px);max-width:16ch;margin:20px 0 22px}
.page-hero .lead{max-width:62ch;font-size:clamp(16px,1.25vw,19px);color:var(--graphite)}

/* ---- 正文排版 ---- */
.prose{max-width:72ch}
.prose p{color:var(--graphite);margin-bottom:18px}
.prose p strong{color:var(--ink)}
.note{font-size:13px;color:#8A8780;border-left:2px solid var(--line);padding-left:14px;line-height:1.7}

/* ---- 服务详情排：左编号右内容 ---- */
.svc-detail{display:grid;grid-template-columns:minmax(200px,.72fr) 2fr;gap:clamp(28px,4vw,72px);padding:clamp(44px,6vh,72px) 0;border-bottom:1px solid var(--line)}
.svc-detail .side .num{font-family:var(--font-display);font-size:clamp(40px,4vw,60px);font-weight:700;color:var(--nova);line-height:1;display:block}
.svc-detail h2{font-size:clamp(24px,2.2vw,34px);margin-top:14px}
.svc-detail .body p{color:var(--graphite);margin-bottom:14px}
.check-list{margin-top:22px;display:grid;gap:12px}
.check-list li{position:relative;padding-left:26px;color:var(--graphite);font-size:15.5px;line-height:1.6}
.check-list li::before{content:'';position:absolute;left:0;top:.62em;width:12px;height:12px;background:
  url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Cpath d='M16 3.5 C17.3 10.9 21.1 14.7 28.5 16 C21.1 17.3 17.3 21.1 16 28.5 C14.7 21.1 10.9 17.3 3.5 16 C10.9 14.7 14.7 10.9 16 3.5 Z' fill='%23E04E1B'/%3E%3C/svg%3E") center/contain no-repeat}
.check-list li b{color:var(--ink);font-weight:600}

/* ---- 通用特性卡 ---- */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(18px,2vw,28px)}
.feature{border:1px solid var(--line);padding:clamp(26px,2.4vw,38px);border-radius:2px;display:flex;flex-direction:column;gap:12px;transition:border-color .3s var(--ease),background-color .3s var(--ease)}
.feature:hover{border-color:var(--ink);background:#fff}
.feature .tag{font-size:11px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--nova)}
.feature h3{font-size:18px}
.feature p{color:var(--graphite);font-size:14.5px;line-height:1.65}

/* ---- 画廊/分类卡 ---- */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(18px,2vw,28px)}
.cat{border:1px solid var(--line);border-radius:2px;overflow:hidden;background:#fff;transition:border-color .3s var(--ease)}
.cat:hover{border-color:var(--ink)}
.cat .swatch{height:150px;background:
  repeating-linear-gradient(45deg,rgba(16,16,20,.05) 0 2px,transparent 2px 14px),
  linear-gradient(135deg,#EDEAE3,#F7F5F1)}
.cat .body{padding:22px 24px}
.cat h3{font-size:17px}
.cat p{font-size:14px;color:var(--graphite);margin-top:8px;line-height:1.6}
.cat .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.cat .tags span{font-size:11px;letter-spacing:.08em;text-transform:uppercase;border:1px solid var(--line);padding:4px 10px;color:var(--graphite)}

/* ---- 案例卡 ---- */
.case-card{border:1px solid var(--line);border-radius:2px;padding:clamp(26px,2.6vw,40px);display:grid;gap:16px;background:transparent}
.case-card:hover{background:#fff;border-color:var(--ink)}
.case-card .meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--graphite)}
.case-card .meta b{color:var(--nova);font-weight:600}
.case-card h3{font-size:20px}
.case-card p{color:var(--graphite);font-size:15px}
.case-card .out{font-size:14px;color:var(--ink);border-top:1px solid var(--line);padding-top:14px}
.case-card .out b{color:var(--nova)}

/* ---- 询盘表单 ---- */
.form-wrap{display:grid;grid-template-columns:minmax(300px,.9fr) minmax(320px,1.1fr);gap:clamp(36px,5vw,88px);align-items:start}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1 / -1}
.field label{font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--graphite)}
.field label i{font-style:normal;color:var(--nova)}
.field input,.field select,.field textarea{
  font-family:var(--font-body);font-size:15px;color:var(--ink);
  background:#fff;border:1px solid var(--line);border-radius:2px;padding:13px 14px;
  transition:border-color .25s var(--ease);appearance:none;width:100%;
}
.field textarea{min-height:120px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--ink)}
.form-note{font-size:12.5px;color:#8A8780;margin-top:16px;line-height:1.7}

/* ---- FAQ ---- */
.faq{max-width:820px}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  list-style:none;cursor:pointer;padding:22px 0;font-size:17px;font-weight:600;color:var(--ink);
  display:flex;justify-content:space-between;align-items:center;gap:16px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'+';font-family:var(--font-display);font-size:22px;color:var(--nova);transition:transform .3s var(--ease)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{color:var(--graphite);padding-bottom:24px;font-size:15.5px;line-height:1.75;max-width:66ch}

/* ==========================================================================
   v1.1 移动端适配修正 + 询盘表单状态（2026-11-09）
   ========================================================================== */

/* 通用：按钮与语言切换不换行 */
.btn{white-space:nowrap}
.lang-switch{white-space:nowrap}

/* 移动菜单内的询盘入口（桌面端隐藏，移动端展开时显示） */
.nav-quote-mobile{display:none}
@media (max-width:1080px){
  .nav-open .nav-quote-mobile{display:block;color:var(--nova);font-weight:600}
}

/* 表单蜜罐字段（机器人陷阱，人类不可见） */
.hp-field{position:absolute!important;left:-9999px!important;top:-9999px!important;width:1px;height:1px;opacity:0;overflow:hidden}

/* 表单提交状态 */
.form-result{margin-top:18px;font-size:15px;line-height:1.7}
.form-result.success{border:1px solid var(--nova);background:#fff;padding:22px 24px}
.form-result.success b{color:var(--nova)}
.form-result.error{color:var(--nova);padding:10px 0}
.btn[disabled]{opacity:.6;cursor:wait}

/* 移动端头部与 Hero 修正 */
@media (max-width:1080px){
  .nav{gap:16px}
  .nav-right{gap:14px}
}
@media (max-width:900px){
  .hero-star{display:none} /* 星标水印在小屏会压标题，直接隐藏 */
}
@media (max-width:720px){
  .nav{height:64px}
  .nav-open .nav-links{top:64px}
  .brand{font-size:15px;letter-spacing:.06em}
  .brand svg{width:11px;height:11px;margin:0 4px}
  .lang-switch{font-size:12px}
  .nav-right .btn{display:none} /* 头部询盘按钮小屏收起，入口移入移动菜单与首屏 CTA */
  .hero{padding:84px 0 72px}
  .hero h1{font-size:clamp(32px,8.6vw,44px);max-width:16ch}
  .hero-sub{font-size:16px}
  .hero-ctas{gap:12px;margin-top:34px}
  .hero-ctas .btn{padding:13px 22px;font-size:14px}
  .hero-chips{gap:8px;margin-top:40px}
  .chip{font-size:11px;padding:8px 12px;letter-spacing:.08em}
  .eyebrow{font-size:11px;letter-spacing:.16em}
  .eyebrow::after{flex-basis:32px}
  .page-hero h1{font-size:clamp(30px,8vw,40px)}
}