/* ═══════════════════════════════════════════════════════
   Aquabridge Shipping — 共用样式
   配色与字体与 aquabridgetrading.com 同族：暖纸底 + 靛蓝
   ═══════════════════════════════════════════════════════ */

:root {
  --paper:      #f9f7f3;
  --paper-2:    #f4f1eb;
  --paper-3:    #ede9e0;
  --ink:        #1a1714;
  --ink-2:      #2e2b27;
  --muted:      #8a8278;
  --faint:      #c4bfb5;

  /* 靛蓝取自 logo 圆标 */
  --indigo:     #1e3179;
  --indigo-2:   #16255c;
  --indigo-dim: rgba(30,49,121,0.08);
  --indigo-mid: rgba(30,49,121,0.16);

  --green:      #2e7d5e;
  --green-dim:  rgba(46,125,94,0.10);
  --amber:      #9a7328;
  --amber-dim:  rgba(154,115,40,0.10);

  --serif:      'Cormorant Garamond', Georgia, 'Noto Serif SC', 'Songti SC', serif;
  --sans:       'Inter', -apple-system, 'PingFang SC', 'Hiragino Sans GB', sans-serif;

  --ease:       cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-sm:  0 1px 3px rgba(26,23,20,0.06), 0 1px 2px rgba(26,23,20,0.04);
  --shadow-md:  0 4px 16px rgba(26,23,20,0.08), 0 2px 4px rgba(26,23,20,0.04);
  --shadow-lg:  0 12px 40px rgba(26,23,20,0.10), 0 4px 8px rgba(26,23,20,0.06);

  --maxw:       1200px;
}

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
a { color:inherit; text-decoration:none; }
img { max-width:100%; display:block; }

/* 纸张噪点 */
body::before {
  content:''; position:fixed; inset:0; opacity:.018;
  pointer-events:none; z-index:1000;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size:128px 128px;
}

/* ═══════════ 顶栏 ═══════════ */
.topbar {
  position:fixed; top:0; left:0; right:0; z-index:100;
  display:flex; align-items:center; justify-content:space-between;
  padding:0 max(24px, calc((100vw - 1200px) / 2 + 64px)); height:52px;
  background:rgba(249,247,243,0.92);
  border-bottom:1px solid var(--paper-3);
  backdrop-filter:blur(20px); -webkit-backdrop-filter:blur(20px);
}
/* ═══════════ 品牌标识组件 ═══════════
   不直接拉整张横版 logo：它的字标偏细，缩到导航尺寸会糊、图文比例也散。
   拆成「圆标 + 粗衬线字 + 靛蓝标签」重排，各尺寸下比例可控。 */
.brand { display:inline-flex; align-items:center; gap:.42em; line-height:1; }
.brand-mark { width:1.52em; height:1.52em; flex:none; }
.brand-word {
  font-family:'Bitter', Georgia, serif; font-weight:700;
  font-size:1em; letter-spacing:-.005em; color:var(--indigo);
  white-space:nowrap;
}
.brand-tag {
  font-family:var(--serif); font-weight:500;
  font-size:1.02em; letter-spacing:.15em; text-transform:uppercase;
  color:var(--muted); white-space:nowrap;
  margin-left:.56em; padding-left:.6em;
  border-left:1px solid var(--paper-3);
}
/* 顶栏尺寸由 font-size 一处驱动 */
.topbar-logo { font-size:19px; }
.footer-brand { font-size:19px; }
.topbar-nav {
  position:absolute; left:50%; transform:translateX(-50%);
  display:flex; gap:38px; font-size:13.5px; letter-spacing:.04em; color:var(--muted);
}
.topbar-nav a { position:relative; padding:2px 0; transition:color .25s var(--ease); white-space:nowrap; }
.topbar-nav a:hover, .topbar-nav a.on { color:var(--indigo); }
.topbar-nav a::after {
  content:''; position:absolute; left:0; bottom:-2px; width:0; height:1px;
  background:var(--indigo); transition:width .3s var(--ease);
}
.topbar-nav a:hover::after, .topbar-nav a.on::after { width:100%; }
/* 语言切换 */
.topbar-right { display:flex; align-items:center; gap:18px; }
.lang { display:flex; align-items:center; gap:1px; font-size:11px; letter-spacing:.08em; }
.lang button {
  -webkit-appearance:none; appearance:none;
  background:transparent; border:0; border-radius:0; box-shadow:none;
  margin:0; padding:4px 7px; cursor:pointer; line-height:1;
  font-family:inherit; font-size:11.5px; letter-spacing:.1em;
  color:var(--faint); transition:color .2s var(--ease);
}
.lang button:focus { outline:none; }
.lang button:focus-visible { outline:1px solid var(--indigo-mid); outline-offset:2px; }
.lang button:hover { color:var(--ink-2); }
.lang button.on { color:var(--indigo); font-weight:600; }
.lang span { color:var(--paper-3); font-size:10px; }

.topbar-signin {
  font-size:11.5px; letter-spacing:.5px; padding:7px 15px;
  border:1px solid var(--indigo-mid); border-radius:2px;
  color:var(--indigo); white-space:nowrap;
  transition:all .25s var(--ease);
}
.topbar-signin:hover { background:var(--indigo); color:var(--paper); border-color:var(--indigo); }

.topbar-cta {
  font-size:11.5px; letter-spacing:.5px; padding:7px 15px;
  border:1px solid var(--indigo-mid); border-radius:2px;
  color:var(--indigo); transition:all .25s var(--ease); white-space:nowrap;
}
.topbar-cta:hover { background:var(--indigo); color:var(--paper); border-color:var(--indigo); }

/* ═══════════ 板块骨架 ═══════════ */
.section { max-width:var(--maxw); margin:0 auto; padding:56px 64px 80px; }
/* 锚点跳转时别被固定顶栏切掉标题 */
section[id], div[id] { scroll-margin-top:52px; }
.band { background:var(--paper-2); }
.section-header {
  display:flex; align-items:baseline; gap:16px;
  padding-bottom:18px; border-bottom:1px solid var(--paper-3); margin-bottom:36px;
}
.section-num {
  font-family:var(--serif); font-style:italic; font-size:22px;
  color:var(--faint); min-width:26px;
}
.section-title {
  font-family:var(--serif); font-weight:400; font-size:38px;
  letter-spacing:-.01em; color:var(--ink);
}
.section-title em { font-style:normal; color:var(--indigo); }
.section-sub {
  margin-left:auto; font-size:11px; letter-spacing:1.8px;
  text-transform:uppercase; color:var(--faint);
}
.section-lede {
  font-size:15px; line-height:1.85; color:var(--ink-2);
  max-width:660px; font-weight:300; margin:-22px 0 40px;
}

/* ═══════════ 按钮 ═══════════ */
.btn {
  font-size:13px; letter-spacing:.4px; padding:12px 26px;
  border-radius:2px; transition:all .28s var(--ease);
  display:inline-flex; align-items:center; gap:8px;
}
.btn-primary { background:var(--indigo); color:var(--paper); border:1px solid var(--indigo); }
.btn-primary:hover { background:var(--indigo-2); transform:translateY(-1px); box-shadow:var(--shadow-md); }
.btn-ghost { border:1px solid var(--paper-3); color:var(--ink-2); }
.btn-ghost:hover { border-color:var(--indigo-mid); color:var(--indigo); }

/* ═══════════ 徽标 ═══════════ */
.badge {
  display:inline-block; align-self:flex-start; font-size:10px; letter-spacing:1.4px;
  text-transform:uppercase; padding:4px 10px; border-radius:2px;
}
.badge-soon { background:var(--amber-dim); color:var(--amber); }
.badge-live { background:var(--green-dim); color:var(--green); }
.badge-auth { background:var(--indigo-dim); color:var(--indigo); }

/* ═══════════ 联系 ═══════════ */
.contact-wrap { display:flex; gap:60px; align-items:flex-start; flex-wrap:wrap; }
.contact-left { flex:1 1 420px; }
.contact-en {
  font-size:10.5px; letter-spacing:2px; text-transform:uppercase;
  color:var(--faint); margin-bottom:18px;
}
.contact-head {
  font-family:var(--serif); font-size:clamp(30px, 3.6vw, 46px);
  line-height:1.18; color:var(--ink); margin-bottom:20px;
}
.contact-head em { font-style:normal; color:var(--indigo); }
.contact-body { font-size:14.5px; line-height:1.85; color:var(--ink-2); font-weight:300; max-width:480px; }
.contact-right { flex:0 1 340px; }
.contact-row {
  display:flex; align-items:baseline; gap:14px;
  padding:15px 0; border-bottom:1px solid var(--paper-3);
}
.contact-k {
  font-size:10.5px; letter-spacing:1.6px; text-transform:uppercase;
  color:var(--faint); min-width:76px;
}
.contact-v { font-size:14px; color:var(--ink-2); line-height:1.7; }
.contact-v a { color:var(--indigo); border-bottom:1px solid var(--indigo-mid); padding-bottom:1px; }
.contact-v a:hover { border-color:var(--indigo); }
.contact-links { display:flex; flex-direction:column; gap:7px; }

/* ═══════════ 页脚 ═══════════ */
footer {
  border-top:1px solid var(--paper-3); padding:34px 64px;
  display:flex; align-items:center; justify-content:space-between;
  flex-wrap:wrap; gap:18px; max-width:var(--maxw); margin:0 auto;
}

.footer-links { display:flex; gap:22px; font-size:12px; color:var(--muted); flex-wrap:wrap; }
.footer-links a:hover { color:var(--indigo); }
.footer-meta { font-size:11px; letter-spacing:1.2px; color:var(--faint); }

/* ═══════════ 进场动画 ═══════════ */
.fade-in { opacity:0; transform:translateY(18px); transition:opacity .8s var(--ease), transform .8s var(--ease); }
.fade-in.on { opacity:1; transform:none; }
@media (prefers-reduced-motion: reduce) {
  .fade-in { opacity:1; transform:none; transition:none; }
  html { scroll-behavior:auto; }
}

/* ═══════════ 响应式 ═══════════ */
@media (max-width: 900px) {
  .topbar { padding:0 20px; height:54px; }
  .topbar-nav { display:none; }
  .topbar-logo { font-size:19px; }
  .section { padding:56px 20px; }
  .section-header { flex-wrap:wrap; gap:10px; }
  .section-sub { margin-left:0; width:100%; }
  footer { padding:28px 20px; }
}