:root {
  --navy: #0b2545;
  --navy-2: #13315c;
  --blue: #13518a;
  --coffee-bg: #0F3460;
  --coffee-deep: #f3e9dc;
  --coffee-tint: rgba(243,233,220,.12);
  --coffee-line: rgba(243,233,220,.16);
  --gold: #c9a24b;
  --gold-soft: #e3c982;
  --ink: #1c2733;
  --muted: #5b6b7b;
  --bg: #f7f8fa;
  --bg-2: #eef1f5;
  --white: #ffffff;
  --line: #e2e7ee;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(15, 52, 96, 0.08);
  --shadow-lg: 0 20px 50px rgba(15, 52, 96, 0.16);
  --serif: "Noto Serif SC", "Songti SC", Georgia, "Times New Roman", serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, system-ui, sans-serif;
  --maxw: 1180px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 92px 0; }
.section.alt { background: var(--bg-2); }
.eyebrow {
  display: inline-block; font-size: 13px; letter-spacing: 3px; text-transform: uppercase;
  color: var(--gold); font-weight: 700; margin-bottom: 14px;
}
h1, h2, h3 { font-family: var(--serif); font-weight: 700; line-height: 1.25; color: var(--navy); }
.section-title { font-size: 34px; margin-bottom: 14px; }
.section-sub { color: var(--muted); max-width: 720px; margin: 0 auto 48px; font-size: 16px; }
.center { text-align: center; }

/* ---------- header ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(15, 52, 96, 0.0);
  transition: all .3s ease;
}
.header.scrolled {
  background: rgba(15, 52, 96, 0.96);
  box-shadow: 0 6px 24px rgba(0,0,0,.18);
}
.header.scrolled .brand,
.header.scrolled .nav-links a { color: rgba(255,255,255,.9); }
.header.scrolled .nav-links a:hover { color: #fff; }
.header.scrolled .lang-toggle { border-color: rgba(255,255,255,.35); }
.header.scrolled .lang-toggle button { color: rgba(255,255,255,.82); }
.header.scrolled .menu-btn { color: #fff; }
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--coffee-deep); }
.brand .logo {
  width: 38px; height: 38px; border-radius: 9px;
  background: linear-gradient(135deg, var(--gold), var(--gold-soft));
  display: grid; place-items: center; font-family: var(--serif); font-weight: 800;
  color: var(--navy); font-size: 18px;
}
/* header-only logo at 2/3 of the enlarged size (footer keeps base size) */
.header .brand .logo {
  width: 51px; height: 51px; border-radius: 11px; font-size: 23px;
}
.brand .name { font-family: var(--serif); font-weight: 700; font-size: 19px; letter-spacing: .5px; }
/* header brand text enlarged 1.5x and bolder (footer keeps base) */
.header .brand .name { font-size: 28px; font-weight: 800; }
.brand .sub { font-size: 11px; letter-spacing: 2px; color: var(--gold-soft); text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a {
  color: rgba(243,233,220,.85); font-size: 15px; position: relative; padding: 6px 0; transition: color .2s;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 2px;
  background: var(--gold); transition: width .25s;
}
.nav-links a:hover { color: var(--coffee-deep); }
.nav-links a:hover::after { width: 100%; }
.nav-right { display: flex; align-items: center; gap: 16px; }
.lang-toggle {
  display: flex; border: 1px solid rgba(243,233,220,.3); border-radius: 999px; overflow: hidden;
}
.lang-toggle button {
  background: transparent; border: none; color: rgba(243,233,220,.82); cursor: pointer;
  font-size: 13px; padding: 6px 13px; font-family: var(--sans); transition: all .2s;
}
.lang-toggle button.active { background: var(--gold); color: var(--navy); font-weight: 700; }
.menu-btn { display: none; background: none; border: none; color: var(--coffee-deep); font-size: 26px; cursor: pointer; }

/* ---------- hero ---------- */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  padding-top: 80px;
  background: var(--coffee-bg);
  color: var(--coffee-deep); overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 26px 26px; opacity: .5;
}
.hero .container { position: relative; z-index: 2; }
.hero h1 { color: var(--coffee-deep); font-size: 52px; line-height: 1.15; max-width: 900px; margin-top: 24px; }
.hero h1 .accent { color: var(--gold); }
.hero p.lead { font-size: 19px; color: rgba(243,233,220,.82); max-width: 720px; margin: 26px 0 18px; }
.hero .pill {
  display: inline-flex; align-items: center; gap: 10px; background: rgba(243,233,220,.08);
  border: 1px solid rgba(243,233,220,.22); padding: 10px 18px; border-radius: 999px;
  font-size: 14px; color: rgba(243,233,220,.9); margin-bottom: 30px;
}
.hero .pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--gold); }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 10px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 14px 30px; border-radius: 999px;
  font-size: 15px; font-weight: 600; cursor: pointer; border: 1px solid transparent; transition: all .2s;
}
.btn-gold { background: linear-gradient(135deg, var(--gold), var(--gold-soft)); color: var(--navy); }
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(201,162,75,.4); }
.btn-gold:disabled, .btn-gold[disabled] { background: #6b7280; color: #d1d5db; cursor: not-allowed; box-shadow: none; transform: none; opacity: .7; }
.btn-ghost { border-color: rgba(243,233,220,.4); color: var(--coffee-deep); }
.btn-ghost:hover { background: rgba(243,233,220,.1); }
.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; margin-top: 46px;
  border-top: 1px solid var(--coffee-line); padding-top: 36px;
}
.hero-stats .num { font-family: var(--serif); font-size: 38px; font-weight: 800; color: var(--gold); }
.hero-stats .unit { font-size: 16px; font-weight: 800; color: var(--gold); margin-left: 4px; }
.hero-stats .lab { font-size: 13px; color: rgba(243,233,220,.78); margin-top: 6px; }

/* ---------- cards / grids ---------- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }

.card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px; box-shadow: var(--shadow); transition: all .25s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--gold-soft); }
.card .ico {
  width: 52px; height: 52px; border-radius: 12px; display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(201,162,75,.16), rgba(15,52,96,.1)); color: #0F3460;
  margin-bottom: 18px;
}
.card h3 { font-size: 20px; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 14.5px; }

/* about */
.about-wrap { background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.about-grid { display: grid; grid-template-columns: 1fr; }
.about-text { padding: 54px; }
.about-text .lead { font-family: var(--serif); font-size: 21px; color: var(--navy); line-height: 1.6; margin-bottom: 22px; }
.about-text p { color: var(--muted); margin-bottom: 16px; }
.about-text .note {
  margin-top: 24px; padding: 16px 20px; background: var(--bg-2); border-left: 4px solid var(--gold);
  border-radius: 8px; font-size: 14px; color: var(--ink);
}
.about-side {
  background: var(--coffee-bg); color: var(--coffee-deep); padding: 54px;
  display: flex; flex-direction: column; justify-content: center;
}
.about-side h3 { color: var(--coffee-deep); font-size: 24px; margin-bottom: 18px; text-align: center; }
.about-side ul { list-style: none; width: fit-content; margin: 0 auto; }
.about-side li { padding: 12px 0; border-bottom: 1px solid var(--coffee-line); display: flex; gap: 12px; align-items: flex-start; text-align: left; }
.about-side li .k { color: var(--gold); font-family: var(--serif); font-weight: 700; min-width: 70px; }

/* process */
.process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step {
  position: relative; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px 26px; box-shadow: var(--shadow);
}
.step .no {
  font-family: var(--serif); font-size: 46px; font-weight: 800; color: var(--gold); opacity: .25; line-height: 1;
}
.step h3 { font-size: 19px; margin: 10px 0 8px; }
.step p { color: var(--muted); font-size: 14px; }
.step::after {
  content: "→"; position: absolute; right: -16px; top: 50%; transform: translateY(-50%);
  color: var(--gold); font-size: 22px; font-weight: 700; z-index: 2;
}
.step:last-child::after { display: none; }

/* stats */
.stats-band {
  background: var(--coffee-bg); color: var(--coffee-deep);
}
.stats-band .grid-4 { gap: 0; }
.stat { text-align: center; padding: 20px; border-right: 1px solid var(--coffee-line); }
.stat:last-child { border-right: none; }
.stat .num { font-family: var(--serif); font-size: 50px; font-weight: 800; color: var(--gold); }
.stat .unit { font-size: 18px; color: var(--gold); }
.stat .lab { color: rgba(243,233,220,.78); margin-top: 8px; font-size: 14px; }

/* cases */
.case-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow); transition: all .25s; }
.case-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.case-card .amt { display: inline-block; font-size: 13px; color: #0F3460; background: rgba(15,52,96,.1); padding: 5px 12px; border-radius: 999px; margin-bottom: 16px; font-weight: 600; }
.case-card h3 { font-size: 20px; margin-bottom: 12px; }
.case-card p { color: var(--muted); font-size: 14.5px; }

/* news */
.news-item { display: flex; gap: 22px; padding: 26px 0; border-bottom: 1px solid var(--line); }
.news-item .date { font-family: var(--serif); font-weight: 700; color: var(--gold); font-size: 16px; min-width: 64px; }
.news-item h3 { font-size: 19px; margin-bottom: 6px; }
.news-item p { color: var(--muted); font-size: 14.5px; }

/* contact */
.contact-grid { display: grid; grid-template-columns: 1fr; gap: 32px; max-width: 760px; margin: 0 auto; }
.contact-info { background: var(--white); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow); }
.contact-info h3 { font-size: 22px; margin-bottom: 12px; }
.contact-info .row { display: flex; gap: 14px; padding: 9px 0; border-bottom: 1px solid var(--line); }
.contact-info .row .k { color: var(--muted); min-width: 90px; }
.contact-info .row .v { color: var(--ink); }
.contact-form { background: var(--coffee-bg); border-radius: var(--radius); padding: 44px; color: var(--coffee-deep); }
.contact-form h3 { color: var(--coffee-deep); font-size: 22px; margin-bottom: 18px; }
.contact-form label { display: block; font-size: 13px; color: rgba(243,233,220,.82); margin: 14px 0 6px; }
.contact-form .req { color: #fff; font-size: 0.5em; font-weight: 700; margin-left: 3px; }
.contact-form input, .contact-form textarea {
  width: 100%; padding: 12px 14px; border-radius: 10px; border: 1px solid rgba(243,233,220,.25);
  background: rgba(255,255,255,.92); color: #0F3460; font-family: var(--sans); font-size: 14px;
}
.contact-form input::placeholder, .contact-form textarea::placeholder { color: rgba(15,52,96,.45); }
.contact-form .btn-gold { display: flex; width: 20%; margin: 22px auto 0; justify-content: center; }
.form-note { font-size: 12px; color: rgba(243,233,220,.7); margin-top: 12px; text-align: center; }

/* upload module — bottom-left of 简要说明 textarea */
.upload-bar { display: flex; align-items: center; gap: 10px; margin-top: 10px; flex-wrap: wrap; }
.upload-add {
  flex: 0 0 auto; display: inline-flex; align-items: center; gap: 4px;
  border: none; background: transparent; padding: 0; cursor: pointer;
  color: #fff; font-size: 13px; line-height: 1; transition: .2s;
}
.upload-add .up-plus { font-size: 20px; line-height: 1; }
.upload-add:hover { color: var(--gold); }
.upload-list { display: flex; gap: 8px; flex-wrap: wrap; flex: 1; }
.upload-chip {
  display: inline-flex; align-items: center; gap: 6px; max-width: 220px;
  background: rgba(255,255,255,.14); color: var(--coffee-deep);
  padding: 5px 8px 5px 12px; border-radius: 999px; font-size: 12px;
}
.upload-chip .up-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 150px; }
.upload-chip .up-del { background: none; border: none; color: var(--coffee-deep); cursor: pointer; font-size: 16px; line-height: 1; padding: 0 2px; }
.upload-chip .up-del:hover { color: var(--gold); }
.upload-chip.uploading { opacity: .65; font-style: italic; }
.upload-chip.up-error { background: rgba(224,83,61,.28); }

/* footer */
.footer { background: var(--coffee-bg); color: rgba(243,233,220,.82); padding: 54px 0 28px; }
.footer .top { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 30px; margin-bottom: 30px; }
.footer .brand .name { color: var(--coffee-deep); }
.footer .fcol h4 { color: var(--coffee-deep); font-size: 15px; margin-bottom: 14px; font-family: var(--sans); }
.footer .fcol a { display: block; padding: 5px 0; font-size: 14px; color: rgba(243,233,220,.78); }
.footer .fcol a:hover { color: var(--gold); }
.footer .bottom { border-top: 1px solid var(--coffee-line); padding-top: 20px; font-size: 13px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.footer .bottom .admin-login { color: var(--gold); text-decoration: none; border-bottom: 1px solid rgba(201,162,75,.45); margin-left: 6px; }
.footer .bottom .admin-login:hover { color: var(--coffee-deep); border-color: var(--coffee-deep); }

/* reveal animation */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* responsive */
@media (max-width: 980px) {
  .grid-2, .grid-3, .grid-4, .about-grid, .contact-grid, .process-steps, .stats-band .grid-4 { grid-template-columns: 1fr; }
  .process-steps .step::after { display: none; }
  .stats-band .grid-4 { gap: 0; }
  .stat { border-right: none; border-bottom: 1px solid var(--coffee-line); }
  .hero h1 { font-size: 38px; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 18px; }
  .nav-links { display: none; }
  .menu-btn { display: block; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0;
    background: rgba(15,52,96,0.96); padding: 20px 24px; gap: 16px;
  }
  .nav-links.open a { color: rgba(255,255,255,.9); }
  .nav-links.open a:hover { color: #fff; }
  .section { padding: 64px 0; }
}