/* 询盘云中文营销站 · site.css v2「航线 × 口径」
   设计语言：外贸人的航海图世界（深海青、经纬网格、航线弧）× 实证口径（mono 数据）。
   Display 用宋体系 400 权重大字号（避免 Windows SimSun 伪粗），正文黑体系统栈。
   Token 见 DESIGN.md；大陆访客不加载任何外部字体。 */
:root{
  --sea:#0A2540; --sea-2:#123A5C; --teal:#147D8A; --teal-hi:#7FD1C0;
  --signal:#E8542F; --amber:#F2A05E;
  --paper:#F2F5F6; --surface:#FFFFFF; --ink:#122333; --ink-dim:#54677A;
  --line:#DCE4E9; --line-dark:rgba(255,255,255,.16);
  --ease:cubic-bezier(.22,.9,.35,1);
  --r:14px; --shadow:0 1px 2px rgba(10,37,64,.05),0 12px 32px rgba(10,37,64,.08);
  --font:'PingFang SC','Microsoft YaHei','Noto Sans SC','Helvetica Neue',sans-serif;
  --serif:'Songti SC','Noto Serif SC','STSong','SimSun',Georgia,serif;
  --mono:'SF Mono',ui-monospace,Menlo,Consolas,'Courier New',monospace;
  /* v1 token 兼容别名：历史/后续会话若引用旧名不致断链（值映射到 v2） */
  --brand:var(--sea); --accent:var(--teal); --accent-hi:var(--sea-2); --bg:var(--paper);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);font-size:17px;line-height:1.8;color:var(--ink);background:var(--paper)}
img,svg{max-width:100%;height:auto}
a{color:var(--teal);text-decoration:none}
a:hover{color:var(--sea)}
h1,h2{font-family:var(--serif);font-weight:400;line-height:1.28;color:var(--sea);margin:.5em 0 .35em;letter-spacing:.01em}
h1{font-size:clamp(30px,4.6vw,46px)}
h2{font-size:clamp(24px,3vw,34px)}
h3{font-size:19px;font-weight:700;line-height:1.4;color:var(--sea);margin:.6em 0 .35em}
h1 em,h2 em{font-style:normal;color:var(--signal)}
p{margin:.6em 0}
.container{width:min(1120px,100vw - 48px);margin-inline:auto}
.mono{font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;color:var(--ink-dim)}
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:8px;top:8px;z-index:99;background:var(--surface);padding:8px 14px;border-radius:8px}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px}

/* ── header ── */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-header.scrolled{box-shadow:0 4px 16px rgba(10,37,64,.08)}
.site-header .container{display:flex;align-items:center;gap:24px;height:66px}
.logo{font-size:22px;font-weight:800;color:var(--sea);display:flex;flex-direction:column;line-height:1.1}
.logo b span{color:var(--signal)}
.logo small{font-size:11px;color:var(--ink-dim);font-weight:500;letter-spacing:.04em}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.main-nav>a,.nav-group>a{padding:8px 12px;border-radius:8px;color:var(--ink);font-size:15px}
.main-nav>a:hover,.nav-group>a:hover{background:var(--paper);color:var(--sea)}
.nav-group{position:relative}
.nav-drop{display:none;position:absolute;top:100%;left:0;min-width:230px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:8px;z-index:60}
.nav-group:hover .nav-drop,.nav-group:focus-within .nav-drop{display:flex;flex-direction:column}
.nav-drop a{padding:10px 12px;border-radius:8px;font-size:15px;color:var(--ink)}
.nav-drop a:hover{background:var(--paper);color:var(--sea)}
.nav-cta{background:var(--signal);color:#fff !important;font-weight:600}
.nav-cta:hover{background:#CE4423}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{display:block;width:22px;height:2px;background:var(--ink);position:relative;content:""}
.nav-toggle span::before{position:absolute;top:-7px}
.nav-toggle span::after{position:absolute;top:7px}

/* ── hero：航线球主视觉 ── */
.hero{position:relative;overflow:hidden;background:
  radial-gradient(1200px 600px at 78% -10%,#17527D 0%,transparent 55%),
  linear-gradient(168deg,#0A2540 0%,#0E3050 58%,#0A2540 100%);color:#DCE8F2;padding:84px 0 72px}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.14;background-image:
  linear-gradient(rgba(127,209,192,.5) 1px,transparent 1px),
  linear-gradient(90deg,rgba(127,209,192,.5) 1px,transparent 1px);background-size:56px 56px}
.hero .container{position:relative;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:48px;align-items:center}
.hero-copy{max-width:640px}
.eyebrow{font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;font-weight:600;color:var(--teal-hi);text-transform:uppercase}
.hero .eyebrow{color:var(--teal-hi)}
.hero-title{color:#fff;margin-top:14px}
.hero-title em{color:var(--amber)}
.hero .lede{font-size:18px;color:#AFC6DA;max-width:560px}
.btn-row{display:flex;gap:12px;flex-wrap:wrap;margin:26px 0 0}
.btn{display:inline-block;padding:13px 24px;border-radius:10px;font-weight:600;font-size:16px;border:1px solid transparent;cursor:pointer;transition:transform .15s var(--ease),background .15s var(--ease)}

.btn-primary{background:var(--signal);color:#fff}
.btn-primary:hover{background:#CE4423;color:#fff}
.btn-ghost{border-color:rgba(255,255,255,.4);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.1);color:#fff}
.section .btn-ghost{border-color:var(--sea);color:var(--sea)}
.section .btn-ghost:hover{background:rgba(10,37,64,.06);color:var(--sea)}

/* 航线球与浮层数据片 */
.hero-visual{position:relative;min-height:380px;display:flex;align-items:center;justify-content:center}
.globe{width:min(440px,100%);filter:drop-shadow(0 24px 48px rgba(0,0,0,.35))}
.route{stroke-dasharray:340;stroke-dashoffset:340;animation:sail 3.2s ease-out forwards}
.r2{animation-delay:.5s}.r3{animation-delay:1s}
.hub-ring{animation:ping 2.6s ease-out infinite}
.port{opacity:0;animation:landfall .5s ease-out forwards}
.p1{animation-delay:2.2s}.p2{animation-delay:2.7s}.p3{animation-delay:3.2s}
@keyframes sail{to{stroke-dashoffset:0}}
@keyframes ping{0%{transform:scale(1);opacity:.9}80%,100%{transform:scale(2.6);opacity:0}}
@keyframes landfall{from{opacity:0;transform:scale(.4)}to{opacity:1;transform:scale(1)}}
.hub-ring,.port{transform-origin:center;transform-box:fill-box}
.hero-chip{position:absolute;background:rgba(10,25,41,.78);border:1px solid var(--line-dark);border-radius:12px;padding:10px 14px;display:flex;flex-direction:column;gap:4px;backdrop-filter:blur(6px);box-shadow:0 12px 32px rgba(0,0,0,.3)}
.chip-sc{left:-8px;bottom:52px;width:180px}
.chip-reply{right:-4px;top:34px;width:172px}
.chip-agency{left:6%;top:-6px;width:190px}
.chip-label{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--teal-hi);text-transform:uppercase}
.chip-value{font-size:12.5px;color:#AFC6DA}
.chip-big{font-family:var(--serif);font-size:30px;color:#fff;line-height:1.1}
.chip-big small{font-size:13px;color:#AFC6DA;font-family:var(--font)}

/* 口径带：hero 底部横向数据带 */
.hero-kpis{position:relative;grid-column:1/-1;display:grid;grid-template-columns:repeat(4,1fr);margin-top:56px;border:1px solid var(--line-dark);border-radius:var(--r);overflow:hidden;background:rgba(255,255,255,.04)}
.kpi{padding:18px 20px;border-left:1px solid var(--line-dark)}
.kpi:first-child{border-left:0}
.kpi b{display:block;font-family:var(--serif);font-weight:400;font-size:26px;color:#fff;line-height:1.2}
.kpi small{display:block;margin-top:4px;font-size:12.5px;line-height:1.5;color:#8FA9C0}

/* ── section 通用 ── */
.section{padding:72px 0}
.section:nth-of-type(even){background:var(--surface)}
.section-head{max-width:720px;margin-bottom:36px}
.section-head .eyebrow{color:var(--teal)}
.section-head p{color:var(--ink-dim)}
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* 卡片：平面 + 顶部航线规则线 */
.card{position:relative;display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:24px 22px 22px;color:var(--ink);transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease)}
.card::before{content:"";position:absolute;top:-1px;left:22px;right:60%;height:3px;border-radius:0 0 3px 3px;background:var(--teal);opacity:0;transition:opacity .18s ease,right .3s ease}

.card p{color:var(--ink-dim);font-size:15px;line-height:1.7;margin:.4em 0 0}
.card .mono{color:var(--teal)}
.icon{width:34px;height:34px;color:var(--sea);stroke-width:2}
.icon .a2{stroke:var(--signal)}
.card .icon{margin-bottom:10px}
.svc-head{display:flex;align-items:center;justify-content:space-between}
.grade-chip{font-family:var(--mono);font-size:11px;letter-spacing:.08em;padding:3px 8px;border-radius:999px;border:1px solid var(--line);color:var(--ink-dim)}
.grade-S{border-color:var(--signal);color:var(--signal)}
.grade-A{border-color:var(--teal);color:var(--teal)}

/* value / tools */
.value-card .icon,.tool-card .icon{width:36px;height:36px}

/* ── 博客 ── */
.blog-card{padding:0;overflow:hidden}
.blog-card .cover{display:block;aspect-ratio:16/9;width:100%;object-fit:cover;border-bottom:1px solid var(--line)}
.blog-card .blog-card-body{padding:18px 20px 20px}
.blog-card h3{margin:0 0 6px;font-size:17px}
.article-hero{background:linear-gradient(168deg,#0A2540,#123A5C);color:#DCE8F2;padding:64px 0 56px}
.article-body{max-width:760px}
.article-cover{display:block;width:100%;border-radius:var(--r);border:1px solid var(--line);margin:0 0 28px}
.article-body h2{font-size:26px;margin-top:1.6em}
.article-body h3{margin-top:1.4em}
.article-body p{color:#2A3B4C}
.article-body table{width:100%;border-collapse:collapse;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.article-body th{background:var(--paper)}
.table-wrap{overflow-x:auto}
.faq h3{margin-top:1.2em}
.faq p{color:var(--ink-dim)}

/* ── CTA 带 ── */
.cta-band{background:
  radial-gradient(700px 300px at 85% 0%,#17527D 0%,transparent 60%),
  linear-gradient(168deg,#0A2540,#0E3050);color:#DCE8F2}
.cta-band h2{color:#fff}
.cta-band p{color:#AFC6DA;max-width:640px}
.cta-inner{position:relative}

/* hero-page（内页头）沿用深海底 */
.hero-page{padding:64px 0 56px}
.hero-page .hero-icon{position:absolute;right:6%;top:50%;transform:translateY(-50%);width:150px;height:150px;color:rgba(127,209,192,.55);pointer-events:none}
.hero-page .hero-icon .icon{width:100%;height:100%;stroke-width:1.3}
.hero-page .hero-icon .a2{stroke:rgba(232,84,47,.6)}
.hero-page .container{display:block}

/* ── 表单 / 联系 ── */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-grid .full{grid-column:1/-1}
input,textarea,select{width:100%;padding:12px 14px;font:inherit;font-size:15px;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:10px}
input:focus,textarea:focus{outline:2px solid var(--teal);outline-offset:0;border-color:var(--teal)}
label{font-size:14px;font-weight:600;color:var(--sea)}

/* ── footer ── */
.site-footer{background:var(--sea);color:#8FA9C0;padding:56px 0 28px;font-size:14.5px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.footer-col h3{color:#fff;font-size:15px;margin:0 0 12px}
.footer-col a{display:block;color:#8FA9C0;padding:4px 0}
.footer-col a:hover{color:var(--teal-hi)}
.footer-bottom{margin-top:36px;padding-top:18px;border-top:1px solid var(--line-dark);font-size:13px;color:#5F7A93}

/* ── 滚动显现 ── */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ── 响应式 ── */
@media (max-width:960px){
  .hero .container{grid-template-columns:1fr;gap:32px}
  .hero-visual{min-height:0;order:-1}
  .globe{width:min(320px,80vw)}
  .chip-sc{left:0;bottom:8px}.chip-reply{right:0;top:0}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .hero-kpis{grid-template-columns:repeat(2,1fr)}
  .kpi:nth-child(3){border-left:0}
  .kpi{border-top:1px solid var(--line-dark)}
  .kpi:nth-child(-n+2){border-top:0}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero-page .hero-icon{display:none}
}
@media (max-width:640px){
  body{font-size:16px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .main-nav{display:none;position:absolute;top:66px;left:0;right:0;background:var(--surface);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:12px;gap:2px}
  .main-nav.open{display:flex}
  .nav-drop{position:static;display:flex;flex-direction:column;border:0;box-shadow:none;padding:0 0 0 16px}
  .nav-toggle{display:block;margin-left:auto}
  .hero{padding:56px 0 48px}
  .hero-chip{position:static;width:auto;margin-top:10px}
  .hero-visual{flex-direction:column;gap:8px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
  html{scroll-behavior:auto}
  .route{stroke-dashoffset:0}
  .port,.reveal{opacity:1;transform:none}
}

/* ── 增长闭环（六板块首页）── */
.flow{display:flex;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px 12px;box-shadow:var(--shadow)}
.flow-step{flex:1;min-width:150px;text-align:center;padding:6px 10px}
.flow-num{font-family:var(--mono);font-size:12px;color:var(--accent);display:block;margin-bottom:6px;letter-spacing:.08em}
.flow-step b{display:block;color:var(--brand);font-size:17px}
.flow-step small{display:block;color:var(--ink-dim);font-size:13px;margin-top:4px}
.flow-arrow{display:flex;align-items:center;color:var(--accent);font-size:20px;flex:0 0 auto}
@media(max-width:880px){.flow{flex-wrap:wrap;justify-content:center}.flow-step{min-width:0;flex:1 1 40%}}
@media(max-width:640px){.flow{flex-direction:column;gap:14px}.flow-step{min-width:0}.flow-arrow{transform:rotate(90deg);font-size:18px}}

/* ── 数字背书 ── */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:24px 16px;text-align:center;box-shadow:var(--shadow)}
.stat b{display:block;font-size:clamp(28px,3.2vw,38px);font-weight:800;color:var(--brand);letter-spacing:-.02em}
.stat small{color:var(--ink-dim);font-size:14px}
@media(max-width:640px){.stats{grid-template-columns:repeat(2,1fr)}}

/* ── FAQ 手风琴（details/summary）── */
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:12px;margin:8px 0;overflow:hidden}
.faq summary{cursor:pointer;list-style:none;padding:14px 18px;font-weight:600;color:var(--sea);display:flex;align-items:center;gap:10px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"";flex:none;width:8px;height:8px;border-right:2px solid var(--teal);border-bottom:2px solid var(--teal);transform:rotate(-45deg);transition:transform .18s ease}
.faq details[open] summary::before{transform:rotate(45deg)}
.faq details p{margin:0;padding:0 18px 16px 36px;color:var(--ink-dim);font-size:15px}
.faq details[open]{border-color:#C5D3DB}

/* ── 六步法等有序步骤（ol.steps）：编号圆点行 ── */
ol.steps{list-style:none;margin:16px 0;padding:0;counter-reset:step}
ol.steps li{counter-increment:step;position:relative;padding:12px 16px 12px 52px;margin:6px 0;background:var(--surface);border:1px solid var(--line);border-radius:12px;font-size:15.5px}
ol.steps li::before{content:counter(step,decimal-leading-zero);position:absolute;left:16px;top:50%;transform:translateY(-50%);font-family:var(--mono);font-size:12px;font-weight:600;color:var(--teal);border:1.5px solid var(--teal);border-radius:999px;padding:2px 7px}
.note{font-size:14px;color:var(--ink-dim);border-left:3px solid var(--amber);padding:6px 0 6px 14px;background:transparent}

/* ── stats/flow v2 增强（覆盖会话追加段的默认观感）── */
.stat b{font-family:var(--serif);font-weight:400;color:var(--sea)}
.stat b::after{content:"";display:block;width:28px;height:3px;border-radius:2px;background:var(--signal);margin:8px auto 0}
.flow-num{color:var(--teal)}
.flow-arrow{color:var(--signal)}

/* ── 指针交互（SOP ⑧ 机器查项：hover 门控 + :active 按压 + 自定义缓动）── */
@media (hover: hover){
  .btn:hover{transform:translateY(-1px)}
  .card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#C5D3DB}
  .card:hover::before{opacity:1;right:22px}
}
.btn:active{transform:scale(0.97)}
.card:active{transform:scale(0.99)}
.faq summary:active{opacity:.7}

/* ── 文章页尾相关服务卡 ── */
.svc-cta{display:flex;flex-direction:column;background:linear-gradient(168deg,#0A2540,#123A5C);border-color:transparent;color:#DCE8F2}
.svc-cta h3{color:#fff;margin-top:6px}
.svc-cta p{color:#AFC6DA}
.svc-cta .eyebrow{color:var(--teal-hi)}
.svc-cta-link{margin-top:auto;padding-top:10px;color:var(--amber);font-weight:600;font-size:14px}