/* ============================================================
   海桑派官网 · 样式
   设计基准：1440 宽 / 内容区 1200 / 左右留白 120
   ============================================================ */

:root{
  /* 底色与文字 */
  --bg:            #F6F5F2;
  --surface:       #FFFFFF;
  --surface-alt:   #F7F6F3;
  --ink:           #16211D;
  --ink-2:         #5C6661;
  --ink-3:         #8C948F;
  --line:          #E4E4DD;
  --line-soft:     #E9E9E2;

  /* 品牌色 */
  --green:         #156E5A;
  --green-soft:    #E4EFEA;
  --green-pale:    #CFE0D8;
  --green-bright:  #7FD3B8;

  /* 语义色 */
  --rust:          #B4543A;

  /* 深色区 */
  --dark:          #111E1A;
  --dark-tile:     #1B2A25;
  --dark-panel:    #16241F;
  --dark-line:     #24332C;
  --dark-ink:      #F3F5F3;
  --dark-ink-2:    #D5DCD8;
  --dark-ink-3:    #8B9A93;
  --footer:        #0B1613;

  /* 字体 */
  --font-sans: "Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:  "Geist","Inter",-apple-system,"SF Pro Display",system-ui,sans-serif;
  --font-mono: "Geist Mono","SF Mono","JetBrains Mono",ui-monospace,Menlo,monospace;

  --shadow-card: 0 16px 40px -16px rgba(23,41,33,0.10);
  --shadow-btn:  0 10px 24px -6px rgba(21,110,90,0.34);
}

*,*::before,*::after{ box-sizing:border-box; }

html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

img{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
figure{ margin:0; }
h1,h2,h3,h4,h5,h6,p{ margin:0; }
hr{ border:0; margin:0; }

.wrap{ width:100%; max-width:1440px; margin:0 auto; padding-left:120px; padding-right:120px; }

.num{ font-family:var(--font-num); font-feature-settings:"tnum" 1; }

/* ---------- 通用文字层级 ---------- */
.h1{ font-size:50px; line-height:66px; font-weight:700; letter-spacing:-0.5px; }
.h2{ font-size:40px; line-height:58px; font-weight:700; letter-spacing:-0.4px; }
.h3{ font-size:28px; line-height:40px; font-weight:700; }
.h4{ font-size:32px; line-height:46px; font-weight:700; letter-spacing:-0.3px; }
.h5,.h6{ font-size:40px; line-height:56px; font-weight:700; letter-spacing:-0.4px; }

.body-text{ font-size:17px; line-height:31px; color:var(--ink-2); }

.eyebrow{
  display:inline-block;
  font-size:13px; font-weight:600; letter-spacing:1.4px;
  color:var(--green);
}
.eyebrow.on-dark{ color:var(--green-bright); }

.hairline{ width:100%; height:1px; background:var(--line); }

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  border-radius:12px; font-weight:600; white-space:nowrap;
  transition:transform .18s ease, box-shadow .18s ease, background-color .18s ease, border-color .18s ease;
}
.btn-lg{ padding:16px 30px; font-size:17px; }
.btn-sm{ padding:11px 22px; font-size:15px; border-radius:10px; font-weight:600; }

.btn-primary{ background:var(--green); color:#fff; box-shadow:var(--shadow-btn); }
.btn-primary:hover{ background:#12604F; transform:translateY(-1px); box-shadow:0 14px 30px -6px rgba(21,110,90,0.42); }

.btn-ghost{ background:var(--surface); color:var(--ink); border:1px solid #E0E0D8; font-weight:500; }
.btn-ghost:hover{ border-color:#C9CCC1; transform:translateY(-1px); }

/* ============================================================
   页头
   ============================================================ */
.site-header{ position:sticky; top:0; z-index:50; background:var(--bg); }

.header-inner{
  display:flex; align-items:center; justify-content:space-between; gap:40px;
  padding-top:20px; padding-bottom:20px;
}

.brand{ display:inline-flex; align-items:center; gap:10px; }
.logo-mark{ flex:none; }
.wordmark{ font-size:20px; font-weight:700; letter-spacing:0.5px; color:var(--ink); }

.nav{ display:flex; align-items:center; gap:36px; }
.nav a{ font-size:15px; font-weight:500; color:var(--ink-2); transition:color .18s ease; }
.nav a:hover{ color:var(--green); }

.header-actions{ display:flex; align-items:center; gap:22px; }
.nav-login{ font-size:15px; font-weight:500; color:var(--ink); }
.nav-login:hover{ color:var(--green); }

/* ============================================================
   首屏
   ============================================================ */
.hero{ padding-top:76px; padding-bottom:84px; }
.hero > .wrap + .wrap{ margin-top:58px; }

.hero-top{ display:flex; align-items:center; gap:64px; }

.hero-copy{ flex:1 1 auto; min-width:0; display:flex; flex-direction:column; align-items:flex-start; gap:26px; }

.badge{
  display:inline-flex; align-items:center; gap:8px;
  padding:7px 14px; border-radius:999px;
  background:var(--green-soft); color:var(--green);
  font-size:13px; font-weight:500;
}
.badge-dot{ width:7px; height:7px; border-radius:50%; background:var(--green); flex:none; }

.hero-sub{ font-size:18px; line-height:33px; color:var(--ink-2); }
.cta-row{ display:flex; align-items:center; gap:14px; flex-wrap:wrap; }
.trust-line{ font-size:14px; color:var(--ink-3); }

/* ---------- 经营看板 ---------- */
.hero-visual{
  flex:none; width:600px; height:460px;
  display:flex; flex-direction:column; gap:20px;
  background:var(--dark); border-radius:22px; padding:26px;
  overflow:hidden;
  box-shadow:0 24px 48px -12px rgba(15,36,31,0.30);
}
.board-head{ display:flex; align-items:center; justify-content:space-between; gap:12px; }
.board-title{ font-size:15px; font-weight:600; color:var(--dark-ink); }
.board-meta{ font-family:var(--font-mono); font-size:12px; font-weight:500; color:var(--dark-ink-3); }

.kpi-row{ display:flex; gap:12px; align-items:flex-start; }
.kpi{
  flex:1 1 0; min-width:0;
  display:flex; flex-direction:column; gap:7px;
  background:var(--dark-tile); border-radius:14px; padding:14px;
}
.kpi-label{ font-size:12px; color:var(--dark-ink-3); }
.kpi-value{ font-size:23px; font-weight:600; color:var(--dark-ink); line-height:1.25; }
.kpi-delta{ font-size:12px; font-weight:500; }
.kpi-delta.up{ color:var(--green-bright); }
.kpi-delta.down{ color:#DB8A6E; }

.chart-panel{
  flex:1 1 auto; min-height:0;
  display:flex; flex-direction:column; gap:12px;
  background:var(--dark-panel); border-radius:16px; padding:18px;
}
.chart-label{ font-size:12px; color:var(--dark-ink-3); }
.trend{ width:100%; flex:1 1 auto; min-height:120px; display:block; }

/* ---------- 数据源接入条 ---------- */
.source-strip{ display:flex; flex-direction:column; gap:22px; }
.source-row{ display:flex; align-items:center; justify-content:space-between; gap:24px; flex-wrap:wrap; }
.source-group{ display:flex; align-items:center; gap:20px; flex-wrap:wrap; }
.source-label{ font-size:13px; color:var(--ink-3); }
.chips{ display:flex; align-items:center; gap:10px; flex-wrap:wrap; }
.chip{
  display:inline-flex; align-items:center;
  padding:8px 16px; border-radius:999px;
  background:var(--surface); border:1px solid var(--line);
  font-size:13px; color:var(--ink-2); font-weight:500;
}
.source-note{ font-size:13px; color:var(--ink-3); }

/* ============================================================
   痛点与工作原理
   ============================================================ */
.s-pain{ background:var(--surface); }
.s-pain > .wrap{ display:flex; flex-direction:column; gap:68px; padding-top:100px; padding-bottom:104px; }

.pain-row{ display:flex; align-items:center; gap:72px; }
.pain-copy{ flex:1 1 auto; min-width:0; display:flex; flex-direction:column; align-items:flex-start; gap:24px; }

.pain-list{ display:flex; flex-direction:column; gap:16px; width:100%; }
.pain-list li{ display:flex; align-items:center; gap:12px; font-size:15px; color:var(--ink-2); }
.pain-icon{ flex:none; }

.pain-photo{
  flex:none; width:552px; height:392px;
  border-radius:18px; overflow:hidden; background:#E9E9E2;
}
.pain-photo img{ width:100%; height:100%; object-fit:cover; }

.how{ display:flex; flex-direction:column; gap:36px; }
.how-head{ display:flex; flex-direction:column; gap:12px; }

.steps{ display:flex; align-items:flex-start; }
.step{ flex:1 1 0; min-width:0; display:flex; flex-direction:column; gap:14px; padding-right:36px; }
.step + .step-divider + .step{ padding-left:36px; }
.step:last-child{ padding-right:0; }
.step-divider{ flex:none; width:1px; height:132px; background:var(--line); }

.step-no{ font-size:13px; font-weight:600; letter-spacing:1.6px; color:var(--green); }
.step-title{ font-size:20px; line-height:1.5; font-weight:600; }
.step-desc{ font-size:15px; line-height:27px; color:var(--ink-2); }

/* ============================================================
   核心功能
   ============================================================ */
.s-features > .wrap{
  display:flex; flex-direction:column; gap:100px;
  padding-top:104px; padding-bottom:104px;
}

.feature-row{ display:flex; align-items:center; gap:72px; }
.feature-row.reverse{ flex-direction:row-reverse; }
.feature-copy{ flex:1 1 auto; min-width:0; display:flex; flex-direction:column; align-items:flex-start; gap:20px; }
.feature-meta{ font-size:14px; color:var(--ink-3); }

.panel{
  flex:none; width:552px;
  display:flex; flex-direction:column; gap:18px;
  background:var(--surface); border:1px solid var(--line-soft); border-radius:18px;
  padding:24px;
  box-shadow:var(--shadow-card);
}
.panel-head{ display:flex; align-items:center; justify-content:space-between; gap:12px; }
.panel-title{ font-size:14px; font-weight:600; color:var(--ink); }
.panel-meta{ font-size:12px; color:var(--ink-3); }
.panel-chart{ width:100%; height:auto; display:block; }

/* ============================================================
   平台能力
   ============================================================ */
.s-platform{ background:var(--surface); }
.s-platform > .wrap{
  display:flex; flex-direction:column; gap:56px;
  padding-top:104px; padding-bottom:104px;
}

.section-head{ display:flex; flex-direction:column; align-items:flex-start; gap:14px; }

.bento-row{ display:flex; align-items:stretch; gap:24px; }

.card{
  display:flex; flex-direction:column; gap:14px;
  background:var(--surface-alt); border-radius:20px; padding:24px;
  min-height:236px;
  transition:transform .22s ease, box-shadow .22s ease;
}
.card:hover{ transform:translateY(-3px); box-shadow:0 20px 40px -20px rgba(23,41,33,0.16); }
.card-wide{ flex:600 1 0; min-width:0; }
.card-narrow{ flex:276 1 0; min-width:0; }
.card-icon{ flex:none; }
.card-title{ font-size:18px; font-weight:600; }
.card-desc{ flex:1 1 auto; font-size:15px; line-height:28px; color:var(--ink-2); }
.card-motif{ width:200px; height:44px; flex:none; }

/* ============================================================
   客户与数据（深色）
   ============================================================ */
.s-clients{ background:var(--dark); }
.s-clients > .wrap{
  display:flex; flex-direction:column; gap:64px;
  padding-top:104px; padding-bottom:104px;
}
.s-clients .h6,
.s-clients .section-head{ color:var(--dark-ink); }

.stats-row{ display:flex; align-items:flex-start; }
.stat{ flex:1 1 0; min-width:0; display:flex; flex-direction:column; gap:10px; padding-right:36px; }
.stats-row .stat:not(:first-child){ padding-left:36px; }
.stats-row .stat:last-child{ padding-right:0; }
.stat-divider{ flex:none; width:1px; height:78px; background:var(--dark-line); }
.stat-value{ font-size:34px; font-weight:600; color:var(--dark-ink); line-height:1.25; }
.stat-label{ font-size:14px; color:var(--dark-ink-3); }

.quote-row{ display:flex; align-items:flex-start; }
.quote{ flex:1 1 0; min-width:0; display:flex; flex-direction:column; gap:20px; padding-right:36px; }
.quote-row .quote:not(:first-child){ padding-left:36px; }
.quote-row .quote:last-child{ padding-right:0; }
.quote p{ font-size:16px; line-height:30px; color:var(--dark-ink-2); }
.quote-rule{ width:28px; height:2px; background:var(--green-bright); }
.quote cite{ display:flex; flex-direction:column; gap:4px; font-style:normal; }
.quote-name{ font-size:15px; font-weight:600; color:var(--dark-ink); }
.quote-role{ font-size:13px; color:var(--dark-ink-3); }
.quote-divider{ flex:none; width:1px; align-self:stretch; min-height:222px; background:var(--dark-line); }

/* ============================================================
   页脚
   ============================================================ */
.site-footer{ background:var(--footer); }
.site-footer > .wrap{
  display:flex; flex-direction:column; gap:56px;
  padding-top:68px; padding-bottom:34px;
}
.footer-motif{ width:100%; height:64px; display:block; }

.footer-top{ display:flex; align-items:flex-start; justify-content:space-between; gap:64px; }
.footer-brand{ flex:none; width:300px; display:flex; flex-direction:column; gap:18px; }
.brand-row{ display:flex; align-items:center; gap:10px; }
.footer-brand .wordmark{ color:var(--dark-ink); }
.tagline{ font-size:15px; line-height:27px; color:var(--dark-ink-3); }

.footer-cols{ display:flex; align-items:flex-start; gap:56px; }
.footer-col{ flex:none; width:140px; display:flex; flex-direction:column; gap:14px; }
.col-title{ font-size:13px; font-weight:600; letter-spacing:1px; color:var(--green-bright); }
.footer-col a{ font-size:15px; color:#B9C4BD; transition:color .18s ease; }
.footer-col a:hover{ color:var(--dark-ink); }

.footer-bottom{ display:flex; flex-direction:column; gap:22px; }
.footer-divider{ width:100%; height:1px; background:#1A2621; }
.bottom-bar{ display:flex; align-items:center; justify-content:space-between; gap:24px; flex-wrap:wrap; }
.copyright{ font-size:13px; color:#6E7C76; }
.legal-row{ display:flex; align-items:center; gap:28px; }
.legal-row a,.legal-row span{ font-size:13px; color:#6E7C76; }
.legal-row a:hover{ color:#9AA8A2; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1360px){
  .wrap{ padding-left:72px; padding-right:72px; }
}

@media (max-width:1180px){
  .wrap{ padding-left:48px; padding-right:48px; }
  .h1{ font-size:44px; line-height:58px; }
  .h2,.h5,.h6{ font-size:34px; line-height:48px; }
  .h4{ font-size:28px; line-height:42px; }
  .hero-visual{ width:520px; height:420px; }
  .hero-top{ gap:44px; }
  .pain-row,.feature-row{ gap:44px; }
  .pain-photo{ width:460px; height:340px; }
  .panel{ width:460px; }
}

@media (max-width:980px){
  .nav{ display:none; }

  .hero-top{ flex-direction:column; align-items:stretch; gap:48px; }
  .hero-visual{ width:100%; height:auto; min-height:400px; }
  .trend{ min-height:150px; }

  .pain-row{ flex-direction:column; align-items:stretch; gap:40px; }
  .pain-photo{ width:100%; height:320px; }

  .steps{ flex-direction:column; gap:28px; }
  .step{ padding:0 !important; }
  .step-divider{ width:100%; height:1px; }

  .feature-row,
  .feature-row.reverse{ flex-direction:column; align-items:stretch; gap:32px; }
  .panel{ width:100%; }

  .bento-row{ flex-direction:column; }
  .card-wide,.card-narrow{ flex:1 1 auto; }
  .card{ min-height:0; }

  .stats-row{ flex-wrap:wrap; gap:32px 0; }
  .stat{ flex:1 1 45%; padding:0 0 0 0 !important; }
  .stat-divider{ display:none; }

  .quote-row{ flex-direction:column; gap:40px; }
  .quote{ padding:0 !important; }
  .quote-divider{ display:none; }

  .footer-top{ flex-direction:column; gap:48px; }
  .footer-brand{ width:100%; }
  .footer-cols{ flex-wrap:wrap; gap:40px 48px; }
}

@media (max-width:680px){
  .wrap{ padding-left:24px; padding-right:24px; }

  .h1{ font-size:32px; line-height:44px; }
  .h2,.h5,.h6{ font-size:26px; line-height:38px; }
  .h3{ font-size:22px; line-height:34px; }
  .h4{ font-size:24px; line-height:36px; }
  .hero-sub{ font-size:16px; line-height:29px; }

  .s-pain > .wrap,
  .s-features > .wrap,
  .s-platform > .wrap,
  .s-clients > .wrap{ padding-top:64px; padding-bottom:64px; gap:48px; }

  .kpi-value{ font-size:19px; }
  .stat-value{ font-size:28px; }
  .pain-photo{ height:220px; }
  .footer-col{ width:calc(50% - 24px); }
  .btn-lg{ padding:14px 22px; font-size:16px; }
  .cta-row{ width:100%; }
  .cta-row .btn{ flex:1 1 auto; }
}