/* =====================================================================
   汇普航贸科技 HPT · 官网视觉设计系统
   风格：现代 / 极简 / 科技蓝 / 航运素材
   产出：纯静态 HTML（无构建工具，WorkBuddy 直接生成）
   ===================================================================== */

/* 引入含完整中文字形的字体，避免个别环境缺字导致“演”等字误显 */
@import url('https://fonts.googleapis.cn/css2?family=Noto+Sans+SC:wght@400;500;700;800&display=swap');

:root {
  /* ---- 色彩：科技蓝体系 ---- */
  --c-primary: #0B4DA2;        /* 主色 深科技蓝 */
  --c-primary-dark: #082E63;   /* 深蓝（hero/footer 底色） */
  --c-primary-darker: #061F47;
  --c-accent: #00B4D8;         /* 强调 海洋青 */
  --c-accent-2: #48CAE4;       /* 浅青 航线/点缀 */
  --c-ink: #0A1F44;            /* 近黑蓝 文字深底 */

  --c-bg: #FFFFFF;
  --c-bg-soft: #F4F8FD;        /* 浅蓝灰 区块底 */
  --c-bg-tint: #EAF2FB;        /* 更浅蓝 卡片底 */
  --c-white: #FFFFFF;

  --c-text: #16233A;           /* 正文 */
  --c-text-soft: #5A6B82;      /* 次级文字 */
  --c-text-faint: #8A99AD;
  --c-border: #E2EAF4;
  --c-border-strong: #C9D8EC;

  /* ---- 排版 ---- */
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --fs-xs: 13px;
  --fs-sm: 15px;
  --fs-base: 16px;
  --fs-md: 18px;
  --fs-lg: 22px;
  --fs-xl: 30px;
  --fs-2xl: 40px;
  --fs-3xl: 56px;

  --lh-tight: 1.18;
  --lh-base: 1.7;
  --ls-tight: -0.02em;

  /* ---- 间距 / 圆角 / 阴影 ---- */
  --sp: 8px;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 3px rgba(11,77,162,0.08), 0 1px 2px rgba(11,77,162,0.06);
  --shadow: 0 10px 30px rgba(11,77,162,0.10);
  --shadow-lg: 0 24px 60px rgba(8,46,99,0.18);
  --maxw: 1180px;
  --header-h: 68px;
}

/* ===================== Reset ===================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; line-height: var(--lh-tight); letter-spacing: var(--ls-tight); color: var(--c-ink); }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
:focus-visible { outline: 3px solid var(--c-accent-2); outline-offset: 2px; border-radius: 4px; }

/* ===================== Layout ===================== */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 88px 0; }
.section--soft { background: var(--c-bg-soft); }
.section--tint { background: var(--c-bg-tint); }
.section--dark {
  background: linear-gradient(160deg, var(--c-primary-dark) 0%, var(--c-primary-darker) 100%);
  color: #EAF2FB;
}
.section--dark h1, .section--dark h2, .section--dark h3 { color: #fff; }
.section-head { max-width: 720px; margin: 0 auto 52px; text-align: center; }
.section-head .eyebrow { color: var(--c-accent); font-weight: 700; font-size: var(--fs-sm); letter-spacing: .14em; text-transform: uppercase; }
.section-head h2 { font-size: var(--fs-2xl); margin: 14px 0 14px; }
.section-head p { color: var(--c-text-soft); font-size: var(--fs-md); }
.section--dark .section-head p { color: #B9CDE6; }

/* ===================== Header / Nav ===================== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  background: rgba(255,255,255,0.86);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--c-border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; color: var(--c-ink); font-size: 18px; letter-spacing: .02em; }
.brand img { height: 34px; width: auto; }
.brand .brand-sub { font-size: 12px; font-weight: 600; color: var(--c-text-faint); letter-spacing: .08em; }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  padding: 9px 14px; border-radius: var(--radius-pill);
  color: var(--c-text); font-size: var(--fs-sm); font-weight: 600;
  transition: background .18s, color .18s;
}
.nav-links a:hover { background: var(--c-bg-soft); color: var(--c-primary); }
.nav-links a.is-active { color: var(--c-primary); background: var(--c-bg-tint); }
.nav-cta { margin-left: 8px; }
.nav-toggle { display: none; }

/* ===================== Buttons ===================== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 24px; border-radius: var(--radius-pill);
  font-size: var(--fs-sm); font-weight: 700; letter-spacing: .01em;
  transition: transform .15s, box-shadow .2s, background .2s, color .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--c-primary); color: #fff; box-shadow: 0 8px 20px rgba(11,77,162,0.28); }
.btn--primary:hover { background: var(--c-primary-dark); }
.btn--accent { background: var(--c-accent); color: #04293a; box-shadow: 0 8px 20px rgba(0,180,216,0.32); }
.btn--accent:hover { background: #00C8EF; }
.btn--ghost { background: transparent; color: var(--c-primary); border: 1.5px solid var(--c-border-strong); }
.btn--ghost:hover { border-color: var(--c-primary); background: var(--c-bg-soft); }
.btn--light { background: #fff; color: var(--c-primary-dark); }
.btn--light:hover { background: var(--c-bg-tint); }
.btn--lg { padding: 16px 30px; font-size: var(--fs-base); }
.btn .arrow { transition: transform .2s; }
.btn:hover .arrow { transform: translateX(3px); }

/* ===================== Hero ===================== */
.hero {
  position: relative; overflow: hidden;
  background: radial-gradient(120% 120% at 85% -10%, #0E59B8 0%, var(--c-primary-dark) 45%, var(--c-primary-darker) 100%);
  color: #EAF2FB;
  padding: 96px 0 104px;
}
.hero::after { /* 航线/波纹装饰 */
  content: ""; position: absolute; right: -160px; top: -120px;
  width: 620px; height: 620px; border-radius: 50%;
  background:
    radial-gradient(circle at center, transparent 58%, rgba(72,202,228,0.12) 59%, transparent 61%),
    radial-gradient(circle at center, transparent 72%, rgba(72,202,228,0.10) 73%, transparent 75%),
    radial-gradient(circle at center, transparent 86%, rgba(72,202,228,0.08) 87%, transparent 89%);
  pointer-events: none;
}
.hero .container { position: relative; z-index: 2; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }
.hero .eyebrow { display: inline-block; color: var(--c-accent-2); font-weight: 700; letter-spacing: .14em; text-transform: uppercase; font-size: var(--fs-sm); margin-bottom: 18px; }
.hero h1 { color: #fff; font-size: var(--fs-3xl); font-weight: 800; max-width: 13em; }
.hero h1 .hl { color: var(--c-accent-2); }
.hero .lead { margin: 22px 0 32px; font-size: var(--fs-md); color: #C7DCF2; max-width: 34em; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 36px; margin-top: 44px; flex-wrap: wrap; }
.hero-stats .stat .num { font-size: var(--fs-xl); font-weight: 800; color: #fff; }
.hero-stats .stat .label { font-size: var(--fs-xs); color: #9FBBDD; letter-spacing: .04em; }

/* Hero 视觉：航运插画（集装箱 + 航线） */
.hero-visual { position: relative; }
.hero-visual svg { width: 100%; height: auto; filter: drop-shadow(0 20px 40px rgba(0,0,0,0.25)); }

/* ===================== Cards ===================== */
.card {
  background: var(--c-white); border: 1px solid var(--c-border);
  border-radius: var(--radius-lg); padding: 30px;
  box-shadow: var(--shadow-sm); transition: transform .2s, box-shadow .2s, border-color .2s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--c-border-strong); }
.card .ico {
  width: 52px; height: 52px; border-radius: 14px;
  display: grid; place-items: center; margin-bottom: 18px;
  background: var(--c-bg-tint); color: var(--c-primary);
}
.card h3 { font-size: var(--fs-lg); margin-bottom: 10px; }
.card p { color: var(--c-text-soft); font-size: var(--fs-sm); }
.card a.more { display: inline-flex; align-items: center; gap: 6px; margin-top: 14px; font-weight: 700; color: var(--c-primary); font-size: var(--fs-sm); transition: gap .2s; }
.card a.more:hover { gap: 10px; }
.role-list { list-style: none; margin: 4px 0 0; padding: 0; }
.role-list li {
  position: relative; padding: 7px 0 7px 26px;
  color: var(--c-text-soft); font-size: var(--fs-sm); line-height: 1.6;
  border-top: 1px dashed var(--c-border);
}
.role-list li:first-child { border-top: none; }
.role-list li::before {
  content: ""; position: absolute; left: 0; top: 11px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--c-primary) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center / 12px no-repeat;
}

.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* 产品卡片（带顶色条） */
.product-card { position: relative; overflow: hidden; display: flex; flex-direction: column; }
.product-card::before { content: ""; position: absolute; left: 0; top: 0; height: 4px; width: 100%; background: linear-gradient(90deg, var(--c-primary), var(--c-accent)); }
.product-card.is-feature { border-color: var(--c-accent); box-shadow: 0 14px 40px rgba(0,180,216,0.18); }
.product-card .tag { align-self: flex-start; font-size: 12px; font-weight: 700; color: var(--c-accent); background: #E2F6FB; padding: 4px 12px; border-radius: var(--radius-pill); margin-bottom: 14px; letter-spacing: .04em; }
.product-card__head { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.product-card__head .ico { margin-bottom: 0; }
.product-card__head .tag { margin-bottom: 0; }
.product-card h3 { font-size: var(--fs-lg); }
.product-card .desc { color: var(--c-text-soft); font-size: var(--fs-sm); margin: 10px 0 18px; flex: 1; }
.product-card .more { font-weight: 700; color: var(--c-primary); font-size: var(--fs-sm); display: inline-flex; align-items: center; gap: 6px; }

/* ===================== Feature row ===================== */
.feature-row { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.feature-row + .feature-row { margin-top: 72px; }
.feature-row.reverse .feature-media { order: -1; }
.feature-media { background: var(--c-bg-soft); border-radius: var(--radius-lg); padding: 36px; border: 1px solid var(--c-border); }
.feature-copy h2 { font-size: var(--fs-xl); margin-bottom: 16px; }
.feature-copy p { color: var(--c-text-soft); margin-bottom: 18px; }
.checklist li { display: flex; gap: 12px; padding: 9px 0; color: var(--c-text); font-size: var(--fs-sm); }
.checklist li svg { flex: none; color: var(--c-accent); margin-top: 3px; }

/* ===================== Timeline / 路线图 ===================== */
.timeline { display: grid; gap: 18px; }
.tl-item { display: grid; grid-template-columns: 64px 1fr; gap: 20px; align-items: start; }
.tl-step { width: 52px; height: 52px; border-radius: 50%; display: grid; place-items: center; font-weight: 800; color: #fff; background: var(--c-primary); box-shadow: var(--shadow-sm); }
.tl-body { background: var(--c-white); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 20px 24px; }
.tl-body h4 { font-size: var(--fs-md); margin-bottom: 6px; }
.tl-body p { color: var(--c-text-soft); font-size: var(--fs-sm); }

/* ===================== Table ===================== */
.table-wrap { overflow-x: auto; border: 1px solid var(--c-border); border-radius: var(--radius); background: #fff; }
table { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); }
th, td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--c-border); }
th { background: var(--c-bg-soft); color: var(--c-ink); font-weight: 700; }
tr:last-child td { border-bottom: none; }
td .k { color: var(--c-text-soft); }

/* ===================== CTA band ===================== */
.cta-band { background: linear-gradient(120deg, var(--c-accent) 0%, var(--c-primary) 100%); color: #fff; border-radius: var(--radius-lg); padding: 52px 48px; display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; box-shadow: var(--shadow-lg); }
.cta-band h2 { color: #fff; font-size: var(--fs-xl); }
.cta-band p { color: #E6F6FB; margin-top: 8px; font-size: var(--fs-sm); }

/* ===================== Footer ===================== */
.site-footer { background: var(--c-primary-darker); color: #B9CDE6; padding: 64px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; }
.site-footer .brand { color: #fff; margin-bottom: 16px; }
.site-footer .brand .brand-sub { color: #7E97BC; }
.footer-about { font-size: var(--fs-sm); color: #9FBBDD; max-width: 30em; }
.footer-col h4 { color: #fff; font-size: var(--fs-sm); letter-spacing: .06em; margin-bottom: 16px; text-transform: uppercase; }
.footer-col a { display: block; padding: 7px 0; color: #9FBBDD; font-size: var(--fs-sm); transition: color .15s; }
.footer-col a:hover { color: #fff; }
.footer-contact li { display: flex; gap: 10px; padding: 6px 0; font-size: var(--fs-sm); color: #9FBBDD; }
.footer-contact li svg { flex: none; color: var(--c-accent-2); margin-top: 3px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.12); margin-top: 44px; padding-top: 22px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: var(--fs-xs); color: #7E97BC; }
.footer-bottom a { color: #9FBBDD; }
.footer-bottom a:hover { color: #fff; }

/* ===================== Forms ===================== */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: var(--fs-sm); font-weight: 600; color: var(--c-ink); }
.field input, .field textarea, .field select {
  font-family: inherit; font-size: var(--fs-sm); color: var(--c-text);
  padding: 12px 14px; border: 1.5px solid var(--c-border); border-radius: var(--radius-sm);
  background: #fff; transition: border-color .15s, box-shadow .15s;
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(11,77,162,0.12); }
.field textarea { resize: vertical; min-height: 120px; }
.form-note { font-size: var(--fs-xs); color: var(--c-text-faint); margin-top: 4px; }
.form-note a { color: var(--c-text-soft); text-decoration: underline; }
.form-note a:hover { color: var(--c-primary); }
.form-success { display: none; background: #E4F7EE; border: 1px solid #9BDDBE; color: #11704A; padding: 18px 22px; border-radius: var(--radius); font-size: var(--fs-sm); margin-top: 18px; }
.form-success.show { display: block; }

/* ===================== Breadcrumb / page hero ===================== */
.page-hero { background: linear-gradient(160deg, var(--c-primary-dark), var(--c-primary-darker)); color: #EAF2FB; padding: 64px 0 60px; }
.page-hero .eyebrow { color: var(--c-accent-2); font-weight: 700; letter-spacing: .14em; text-transform: uppercase; font-size: var(--fs-sm); }
.page-hero h1 { color: #fff; font-size: var(--fs-2xl); margin: 14px 0 12px; }
.page-hero p { color: #C7DCF2; font-size: var(--fs-md); max-width: 40em; }
.crumbs { font-size: var(--fs-xs); color: #9FBBDD; margin-bottom: 18px; }
.crumbs a:hover { color: #fff; }

/* ===================== Article / 文章正文 ===================== */
.article { max-width: 840px; margin: 0 auto; }
.article .meta { color: var(--c-text-soft); font-size: var(--fs-sm); margin-bottom: 6px; }
.article .source { color: var(--c-primary); font-weight: 700; font-size: var(--fs-sm); }
.article h3 { font-size: var(--fs-lg); margin: 38px 0 14px; color: var(--c-ink); }
.article p { color: var(--c-text); font-size: var(--fs-md); margin-bottom: 18px; line-height: 1.95; }
.article .lead { font-size: var(--fs-md); color: var(--c-text-soft); }
.article ol { margin: 0 0 18px; padding-left: 22px; color: var(--c-text); font-size: var(--fs-md); line-height: 1.95; }
.article ol li { margin-bottom: 12px; }
.article .tag-h { display: inline-flex; align-items: center; gap: 8px; font-weight: 800; color: var(--c-primary); font-size: var(--fs-md); margin: 34px 0 12px; }
.article .author { color: var(--c-text-faint); font-size: var(--fs-sm); margin-top: 36px; padding-top: 18px; border-top: 1px solid var(--c-border); }

/* ===================== Pill / badges ===================== */
.pill { display: inline-block; font-size: 12px; font-weight: 700; padding: 5px 13px; border-radius: var(--radius-pill); background: var(--c-bg-tint); color: var(--c-primary); letter-spacing: .03em; }

/* ===================== Quote ===================== */
.quote { border-left: 4px solid var(--c-accent); padding: 6px 0 6px 22px; margin: 22px 0; }
.quote p { font-size: var(--fs-md); color: var(--c-ink); font-style: italic; }
.quote .by { font-size: var(--fs-sm); color: var(--c-text-faint); margin-top: 8px; }
/* 深色区块内的引言：文字转白，避免深蓝底看不清 */
.section--dark .quote p { color: #FFFFFF; }
.section--dark .quote .by { color: #B9CDE6; }

/* ===================== Value list ===================== */
.value-list { display: grid; gap: 16px; }
.value-item { display: grid; grid-template-columns: 44px 1fr; gap: 16px; align-items: start; }
.value-item .vi-ico { width: 44px; height: 44px; border-radius: 12px; background: var(--c-bg-tint); color: var(--c-primary); display: grid; place-items: center; }
.value-item h4 { font-size: var(--fs-md); margin-bottom: 4px; }
.value-item p { color: var(--c-text-soft); font-size: var(--fs-sm); }

/* ===================== Responsive ===================== */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { max-width: 460px; }
  .feature-row, .feature-row.reverse { grid-template-columns: 1fr; }
  .feature-row.reverse .feature-media { order: 0; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .section { padding: 60px 0; }
  .hero { padding: 72px 0 80px; }
  .hero h1 { font-size: 38px; }
  .section-head h2, .page-hero h1 { font-size: 30px; }
  .nav-links { display: none; position: absolute; top: var(--header-h); left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; background: #fff; border-bottom: 1px solid var(--c-border); padding: 10px 16px 18px; box-shadow: var(--shadow); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 14px; }
  .nav-toggle { display: inline-grid; place-items: center; width: 42px; height: 42px; border-radius: 10px; color: var(--c-ink); }
  .nav-cta { display: none; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .cta-band { padding: 36px 26px; }
  .footer-grid { grid-template-columns: 1fr; }
}