/* ===== PeptideStore - 全局样式（青绿/白 研究试剂站风格） ===== */
:root {
  --teal: #0f766e;
  --teal-dark: #115e59;
  --teal-light: #14b8a6;
  --teal-bg: #ecfdf5;
  --ink: #0f172a;
  --text2: #64748b;
  --line: #e2e8f0;
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --amber: #f59e0b;
  --red: #ef4444;
  --green: #10b981;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(15,23,42,.06), 0 8px 24px rgba(15,23,42,.06);
  --maxw: 1200px;
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; color:var(--ink); background:var(--bg); font-size:15px; line-height:1.6; }
a { color:var(--teal); text-decoration:none; }
img { max-width:100%; display:block; }
.container { max-width:var(--maxw); margin:0 auto; padding:0 20px; }

/* ===== 顶部通知条 ===== */
.topbar { background:var(--teal-dark); color:#fff; font-size:13px; }
.topbar .container { display:flex; justify-content:space-between; align-items:center; min-height:38px; gap:12px; flex-wrap:wrap; }
.topbar .tb-items { display:flex; gap:22px; }
.topbar .tb-items span { display:inline-flex; align-items:center; gap:6px; }
.topbar .tb-items .ico { font-size:14px; }

/* ===== 页头 ===== */
header.site { position:sticky; top:0; z-index:100; background:rgba(255,255,255,.95); backdrop-filter:blur(8px); border-bottom:1px solid var(--line); }
header.site .container { display:flex; align-items:center; gap:26px; height:68px; }
.brand { font-size:22px; font-weight:800; color:var(--teal-dark); letter-spacing:-.5px; }
.brand em { font-style:normal; color:var(--teal-light); }
nav.main { display:flex; gap:4px; flex:1; }
nav.main a { padding:8px 13px; border-radius:8px; color:var(--ink); font-weight:500; font-size:14.5px; }
nav.main a:hover { background:var(--teal-bg); color:var(--teal-dark); }
nav.main a.active { color:var(--teal); font-weight:700; }
.head-tools { display:flex; align-items:center; gap:10px; }
.icon-btn { position:relative; width:40px; height:40px; border-radius:10px; border:1px solid var(--line); background:#fff; display:flex; align-items:center; justify-content:center; font-size:17px; cursor:pointer; color:var(--ink); }
.icon-btn:hover { border-color:var(--teal-light); color:var(--teal); }
.icon-btn .count { position:absolute; top:-6px; right:-6px; background:var(--amber); color:#fff; font-size:11px; min-width:18px; height:18px; border-radius:9px; display:flex; align-items:center; justify-content:center; padding:0 4px; font-weight:700; }
.icon-btn .count.hide { display:none; }
.menu-toggle { display:none; }

/* ===== Hero ===== */
.hero { background:linear-gradient(135deg,#f0fdfa 0%,#ecfeff 60%,#f0fdf4 100%); border-bottom:1px solid var(--line); overflow:hidden; }
.hero .container { display:grid; grid-template-columns:1.05fr .95fr; gap:40px; align-items:center; padding-top:56px; padding-bottom:56px; }
.hero h1 { font-size:clamp(28px,4vw,46px); line-height:1.15; font-weight:800; letter-spacing:-1px; color:var(--ink); }
.hero h1 .accent { color:var(--teal); }
.hero p.sub { margin:18px 0 26px; color:var(--text2); font-size:17px; max-width:520px; }
.hero .cta-row { display:flex; gap:12px; flex-wrap:wrap; }
.hero .hero-img { text-align:center; }
.hero .hero-img img { max-height:380px; margin:0 auto; filter:drop-shadow(0 18px 40px rgba(15,118,110,.18)); }

/* ===== 按钮 ===== */
.btn { display:inline-flex; align-items:center; justify-content:center; gap:8px; padding:11px 22px; border-radius:10px; font-size:15px; font-weight:600; border:none; cursor:pointer; transition:.18s; background:var(--teal); color:#fff; }
.btn:hover { background:var(--teal-dark); transform:translateY(-1px); }
.btn.outline { background:#fff; color:var(--teal); border:1.5px solid var(--teal); }
.btn.outline:hover { background:var(--teal-bg); }
.btn.light { background:#fff; color:var(--teal-dark); box-shadow:var(--shadow); }
.btn.light:hover { background:var(--teal-bg); }
.btn.sm { padding:8px 14px; font-size:13.5px; }
.btn.block { width:100%; }
.btn.amber { background:var(--amber); } .btn.amber:hover { background:#d97706; }
.btn[disabled] { opacity:.55; cursor:not-allowed; transform:none; }

/* ===== 特性条 ===== */
.feature-strip { border-bottom:1px solid var(--line); background:var(--bg-soft); }
.feature-strip .container { display:grid; grid-template-columns:repeat(4,1fr); gap:16px; padding-top:20px; padding-bottom:20px; }
.feature-strip .f { display:flex; align-items:center; gap:12px; }
.feature-strip .f .fi { width:44px; height:44px; border-radius:12px; background:var(--teal-bg); color:var(--teal); display:flex; align-items:center; justify-content:center; font-size:20px; flex-shrink:0; }
.feature-strip .f b { font-size:14.5px; display:block; }
.feature-strip .f small { color:var(--text2); font-size:12.5px; }

/* ===== 区块 ===== */
section.block { padding:64px 0; }
.block-head { text-align:center; max-width:640px; margin:0 auto 36px; }
.block-head .eyebrow { color:var(--teal); font-weight:700; letter-spacing:1.5px; text-transform:uppercase; font-size:12.5px; margin-bottom:8px; }
.block-head h2 { font-size:clamp(24px,3vw,34px); font-weight:800; letter-spacing:-.5px; }
.block-head p { color:var(--text2); margin-top:10px; }

/* ===== 产品网格 ===== */
.product-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(240px,1fr)); gap:22px; }
.product-card { border:1px solid var(--line); border-radius:var(--radius); background:#fff; overflow:hidden; transition:.2s; display:flex; flex-direction:column; }
.product-card:hover { box-shadow:var(--shadow); transform:translateY(-3px); border-color:var(--teal-light); }
.product-card .pc-img { background:linear-gradient(180deg,#f8fafc,#fff); padding:18px; display:flex; align-items:center; justify-content:center; height:210px; }
.product-card .pc-img img { max-height:180px; object-fit:contain; transition:.25s; }
.product-card:hover .pc-img img { transform:scale(1.04); }
.product-card .pc-body { padding:14px 16px 16px; display:flex; flex-direction:column; gap:8px; flex:1; }
.pc-cat { font-size:12px; color:var(--text2); text-transform:uppercase; letter-spacing:.5px; }
.pc-name { font-size:16px; font-weight:700; line-height:1.3; }
.pc-name a { color:var(--ink); } .pc-name a:hover { color:var(--teal); }
.pc-spec { font-size:13px; color:var(--text2); }
.pc-price { display:flex; align-items:baseline; gap:8px; margin-top:auto; }
.pc-price b { font-size:19px; color:var(--teal-dark); font-weight:800; }
.pc-price s { color:var(--text2); font-size:14px; }
.pc-btn { display:flex; gap:8px; margin-top:4px; }
.pc-btn .btn { flex:1; }

/* ===== 产品详情页 ===== */
.product-detail { display:grid; grid-template-columns:1fr 1fr; gap:44px; padding:44px 0; }
.pd-gallery { border:1px solid var(--line); border-radius:16px; background:#fff; padding:28px; display:flex; align-items:center; justify-content:center; }
.pd-gallery img { max-height:420px; object-fit:contain; }
.pd-info h1 { font-size:28px; font-weight:800; }
.pd-info .pd-cat { color:var(--text2); text-transform:uppercase; font-size:13px; letter-spacing:.6px; margin-bottom:10px; }
.pd-price { margin:16px 0; }
.pd-price b { font-size:34px; color:var(--teal-dark); font-weight:800; }
.pd-price s { color:var(--text2); margin-left:10px; }
.pd-table { width:100%; border-collapse:collapse; margin:14px 0 20px; font-size:14px; }
.pd-table td { padding:9px 12px; border-bottom:1px solid var(--line); }
.pd-table td:first-child { color:var(--text2); width:130px; font-weight:500; }
.qty-row { display:flex; align-items:center; gap:12px; margin-bottom:18px; }
.qty { display:inline-flex; align-items:center; border:1px solid var(--line); border-radius:10px; overflow:hidden; }
.qty button { width:38px; height:40px; border:none; background:#fff; font-size:18px; cursor:pointer; color:var(--ink); }
.qty button:hover { background:var(--teal-bg); color:var(--teal); }
.qty input { width:52px; height:40px; border:none; text-align:center; font-size:15px; border-left:1px solid var(--line); border-right:1px solid var(--line); outline:none; }
.pd-desc { margin-top:26px; border-top:1px solid var(--line); padding-top:18px; color:var(--text2); font-size:14.5px; }
.pd-note { margin-top:18px; background:#fffbeb; border:1px solid #fde68a; color:#92400e; border-radius:10px; padding:12px 14px; font-size:13.5px; }

/* ===== 购物车 / 结算 ===== */
.cart-layout { display:grid; grid-template-columns:1.6fr .9fr; gap:26px; padding:34px 0; }
.cart-items .ci { display:grid; grid-template-columns:84px 1fr auto auto auto; align-items:center; gap:16px; border:1px solid var(--line); border-radius:12px; padding:14px; margin-bottom:12px; background:#fff; }
.cart-items .ci img { width:70px; height:70px; object-fit:contain; border-radius:8px; }
.ci-name { font-weight:700; } .ci-name small { display:block; color:var(--text2); font-weight:400; }
.ci-price { font-weight:700; color:var(--teal-dark); min-width:70px; text-align:right; }
.ci-remove { background:none; border:none; color:var(--red); font-size:18px; cursor:pointer; padding:6px; }
.summary-card { border:1px solid var(--line); border-radius:14px; padding:22px; background:#fff; height:fit-content; position:sticky; top:90px; }
.summary-card h3 { font-size:17px; margin-bottom:14px; }
.sum-row { display:flex; justify-content:space-between; padding:8px 0; font-size:14px; color:var(--text2); }
.sum-row.total { border-top:1px solid var(--line); margin-top:8px; padding-top:14px; font-size:18px; font-weight:800; color:var(--ink); }
.empty-cart { text-align:center; padding:70px 0; color:var(--text2); }
.empty-cart .big { font-size:56px; margin-bottom:14px; }

/* 结算表单 */
.checkout-grid { display:grid; grid-template-columns:1.1fr .9fr; gap:26px; padding:34px 0; }
.form-card { border:1px solid var(--line); border-radius:14px; padding:24px; background:#fff; }
.form-card h3 { font-size:17px; margin-bottom:18px; }
.field { margin-bottom:14px; }
.field label { display:block; font-size:13.5px; font-weight:600; color:var(--text2); margin-bottom:6px; }
.field input, .field select, .field textarea { width:100%; padding:11px 13px; border:1px solid var(--line); border-radius:10px; font-size:14.5px; font-family:inherit; background:#fff; }
.field input:focus, .field select:focus, .field textarea:focus { outline:none; border-color:var(--teal-light); box-shadow:0 0 0 3px rgba(20,184,166,.12); }
.form-2 { display:grid; grid-template-columns:1fr 1fr; gap:14px; }

/* ===== 页脚 ===== */
footer.site { background:#0c4a43; color:#d1fae5; margin-top:60px; }
footer.site .container { display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:32px; padding-top:52px; padding-bottom:40px; }
footer.site h4 { color:#fff; font-size:15px; margin-bottom:16px; }
footer.site a { color:#99f6e4; display:block; padding:5px 0; font-size:14px; }
footer.site a:hover { color:#fff; }
footer.site p { font-size:14px; color:#99f6e4; margin:6px 0; }
footer.site .disc { grid-column:1/-1; border-top:1px solid rgba(255,255,255,.14); padding-top:22px; margin-top:8px; font-size:12.5px; color:#a7f3d0; line-height:1.7; }
.footer-bottom { border-top:1px solid rgba(255,255,255,.14); text-align:center; padding:16px; font-size:13px; color:#99f6e4; }

/* ===== 通用内容页 ===== */
.page-hero { background:linear-gradient(135deg,#f0fdfa,#ecfeff); border-bottom:1px solid var(--line); padding:44px 0; text-align:center; }
.page-hero h1 { font-size:32px; font-weight:800; }
.page-hero p { color:var(--text2); margin-top:8px; }
.article { max-width:820px; margin:0 auto; padding:40px 20px; }
.article h2 { font-size:22px; margin:28px 0 12px; }
.article p { color:var(--text2); margin-bottom:12px; }
.article ul { margin:0 0 14px 20px; color:var(--text2); }
.article li { margin-bottom:6px; }

/* FAQ */
.faq-list { max-width:760px; margin:0 auto; padding:40px 20px; }
.faq-item { border:1px solid var(--line); border-radius:12px; margin-bottom:12px; overflow:hidden; background:#fff; }
.faq-q { width:100%; text-align:left; background:none; border:none; padding:16px 18px; font-size:15.5px; font-weight:600; cursor:pointer; display:flex; justify-content:space-between; align-items:center; color:var(--ink); }
.faq-q .arrow { transition:.2s; color:var(--teal); }
.faq-item.open .faq-q .arrow { transform:rotate(180deg); }
.faq-a { max-height:0; overflow:hidden; transition:max-height .25s ease; color:var(--text2); font-size:14.5px; }
.faq-item.open .faq-a { max-height:400px; }
.faq-a > div { padding:0 18px 18px; }

/* 团队 */
.team-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:18px; max-width:900px; margin:0 auto; }
.team-card { text-align:center; border:1px solid var(--line); border-radius:14px; padding:22px 16px; background:#fff; }
.team-card .avatar { width:76px; height:76px; border-radius:50%; background:var(--teal-bg); color:var(--teal); display:flex; align-items:center; justify-content:center; font-size:26px; margin:0 auto 12px; font-weight:700; }
.team-card b { font-size:15px; }
.team-card small { display:block; color:var(--text2); margin-top:4px; font-size:13px; }

/* 联系 */
.contact-grid { display:grid; grid-template-columns:1fr 1fr; gap:26px; padding:40px 0; }
.contact-info .ci-row { display:flex; gap:14px; align-items:flex-start; margin-bottom:18px; }
.contact-info .ci-ico { width:44px; height:44px; border-radius:12px; background:var(--teal-bg); color:var(--teal); display:flex; align-items:center; justify-content:center; font-size:19px; flex-shrink:0; }
.contact-info b { display:block; }
.contact-info small { color:var(--text2); }

/* ===== 提示 ===== */
.toast { position:fixed; bottom:28px; left:50%; transform:translateX(-50%) translateY(20px); background:var(--ink); color:#fff; padding:12px 22px; border-radius:10px; font-size:14px; z-index:400; opacity:0; pointer-events:none; transition:.25s; }
.toast.show { opacity:1; transform:translateX(-50%) translateY(0); }
.toast.success { background:var(--green); }
.toast.error { background:var(--red); }

/* ===== 响应式 ===== */
@media(max-width:960px){
  .hero .container { grid-template-columns:1fr; text-align:center; }
  .hero p.sub { margin-left:auto; margin-right:auto; }
  .hero .cta-row { justify-content:center; }
  .feature-strip .container { grid-template-columns:repeat(2,1fr); }
  .product-detail { grid-template-columns:1fr; }
  .cart-layout, .checkout-grid, .contact-grid { grid-template-columns:1fr; }
  footer.site .container { grid-template-columns:1fr 1fr; }
  .team-grid { grid-template-columns:repeat(2,1fr); }
  .menu-toggle { display:flex; }
  nav.main { display:none; position:absolute; top:68px; left:0; right:0; background:#fff; flex-direction:column; padding:10px 20px 16px; border-bottom:1px solid var(--line); box-shadow:var(--shadow); }
  nav.main.open { display:flex; }
  .cart-items .ci { grid-template-columns:70px 1fr auto; }
  .ci-price { grid-column:3; }
  .ci-remove { grid-column:3; justify-self:end; margin-top:-44px; }
}

/* ===== 语言切换器 ===== */
.lang-switcher { position:relative; display:inline-block; }
.lang-btn {
  display:flex; align-items:center; gap:6px;
  background:transparent; border:1px solid var(--line); border-radius:8px;
  padding:6px 10px; cursor:pointer; font-size:13px; color:var(--text);
  white-space:nowrap;
}
.lang-btn:hover { border-color:var(--teal); background:#f0fdfa; }
.lang-flag { font-size:16px; }
.lang-caret { font-size:10px; color:var(--text2); }
.lang-dropdown {
  display:none; position:absolute; top:calc(100% + 6px); right:0;
  background:#fff; border:1px solid var(--line); border-radius:10px;
  box-shadow:0 8px 24px rgba(0,0,0,.12); min-width:160px; z-index:200;
  overflow:hidden;
}
.lang-dropdown.show { display:block; }
.lang-option {
  display:flex; align-items:center; gap:8px; width:100%;
  padding:9px 14px; background:none; border:none; cursor:pointer;
  font-size:13px; color:var(--text); text-align:left;
}
.lang-option:hover { background:#f0fdfa; }
.lang-option.active { background:#ccfbf1; color:var(--teal-dark); font-weight:600; }

/* ===== Cookie 合规横幅 ===== */
.cookie-banner {
  position:fixed; bottom:0; left:0; right:0; z-index:300;
  background:#115e59; color:#fff; padding:14px 20px;
  display:flex; align-items:center; justify-content:center; gap:16px;
  flex-wrap:wrap; box-shadow:0 -4px 20px rgba(0,0,0,.2);
  animation:slideUp .3s ease;
}
@keyframes slideUp { from{transform:translateY(100%)} to{transform:translateY(0)} }
.cookie-banner p { margin:0; font-size:13px; max-width:700px; line-height:1.5; }
.cookie-banner .cb-btns { display:flex; gap:10px; }
.cookie-banner button {
  padding:8px 18px; border-radius:8px; border:none; cursor:pointer;
  font-size:13px; font-weight:600;
}
.cookie-banner .cb-accept { background:#fff; color:var(--teal-dark); }
.cookie-banner .cb-decline { background:transparent; color:#fff; border:1px solid rgba(255,255,255,.4); }
.cookie-banner .cb-learn { color:#a7f3d0; text-decoration:underline; background:none; border:none; cursor:pointer; padding:0; font-size:13px; }

/* ===== 研究用途合规横幅 ===== */
.compliance-strip {
  background:#fef3c7; color:#92400e; text-align:center;
  padding:7px 16px; font-size:12px; font-weight:600;
  border-bottom:1px solid #fde68a;
}

/* ===== 年龄/用途确认弹窗 ===== */
.age-gate-overlay {
  position:fixed; inset:0; background:rgba(0,0,0,.7); z-index:500;
  display:flex; align-items:center; justify-content:center; padding:20px;
}
.age-gate-box {
  background:#fff; border-radius:16px; padding:32px; max-width:460px;
  text-align:center; box-shadow:0 20px 60px rgba(0,0,0,.3);
}
.age-gate-box h3 { color:var(--teal-dark); margin-bottom:12px; font-size:20px; }
.age-gate-box p { color:var(--text2); font-size:14px; line-height:1.6; margin-bottom:20px; }
.age-gate-box label { display:flex; align-items:center; gap:8px; font-size:13px; margin-bottom:20px; cursor:pointer; text-align:left; }
.age-gate-box .ag-btns { display:flex; gap:10px; justify-content:center; }

/* ===== JSON-LD 不可见 ===== */
script[type="application/ld+json"] { display:none; }

/* ===== AI Chat Widget ===== */
.chat-fab {
  position: fixed; bottom: 24px; right: 24px; z-index: 9999;
  width: 56px; height: 56px; border-radius: 50%;
  background: linear-gradient(135deg, #0d9488, #0f766e);
  color: #fff; border: none; cursor: pointer;
  box-shadow: 0 4px 20px rgba(13,148,136,0.4);
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; transition: transform 0.2s, box-shadow 0.2s;
}
.chat-fab:hover { transform: scale(1.1); box-shadow: 0 6px 28px rgba(13,148,136,0.55); }
.chat-fab .chat-badge {
  position: absolute; top: -2px; right: -2px;
  background: #ef4444; color: #fff; font-size: 10px;
  width: 18px; height: 18px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
}
.chat-window {
  position: fixed; bottom: 90px; right: 24px; z-index: 9999;
  width: 380px; max-width: calc(100vw - 32px);
  height: 520px; max-height: calc(100vh - 120px);
  background: #fff; border-radius: 16px;
  box-shadow: 0 12px 48px rgba(0,0,0,0.18);
  display: none; flex-direction: column; overflow: hidden;
  animation: chatSlideUp 0.25s ease;
}
@keyframes chatSlideUp { from { opacity:0; transform: translateY(20px); } to { opacity:1; transform: translateY(0); } }
.chat-window.open { display: flex; }
.chat-header {
  background: linear-gradient(135deg, #0d9488, #0f766e);
  color: #fff; padding: 14px 16px; display: flex;
  align-items: center; justify-content: space-between;
}
.chat-header .chat-title { display: flex; align-items: center; gap: 10px; }
.chat-header .chat-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(255,255,255,0.2); display: flex;
  align-items: center; justify-content: center; font-size: 18px;
}
.chat-header .chat-name { font-weight: 700; font-size: 15px; }
.chat-header .chat-status { font-size: 11px; opacity: 0.85; display: flex; align-items: center; gap: 4px; }
.chat-header .chat-status::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: #4ade80; display: inline-block; }
.chat-close { background: none; border: none; color: #fff; font-size: 22px; cursor: pointer; opacity: 0.8; padding: 4px; line-height: 1; }
.chat-close:hover { opacity: 1; }
.chat-body {
  flex: 1; overflow-y: auto; padding: 14px;
  background: #f8fafc; display: flex; flex-direction: column; gap: 10px;
}
.chat-msg { max-width: 82%; padding: 10px 14px; border-radius: 14px; font-size: 13.5px; line-height: 1.55; word-wrap: break-word; white-space: pre-wrap; }
.chat-msg.bot { background: #fff; border: 1px solid #e2e8f0; border-bottom-left-radius: 4px; align-self: flex-start; box-shadow: 0 1px 3px rgba(0,0,0,0.05); }
.chat-msg.user { background: #0d9488; color: #fff; border-bottom-right-radius: 4px; align-self: flex-end; }
.chat-msg .msg-time { font-size: 10px; opacity: 0.5; margin-top: 4px; display: block; }
.chat-typing { display: flex; gap: 4px; padding: 10px 14px; background: #fff; border: 1px solid #e2e8f0; border-radius: 14px; border-bottom-left-radius: 4px; align-self: flex-start; width: fit-content; }
.chat-typing span { width: 7px; height: 7px; border-radius: 50%; background: #94a3b8; animation: typingBounce 1.2s infinite; }
.chat-typing span:nth-child(2) { animation-delay: 0.15s; }
.chat-typing span:nth-child(3) { animation-delay: 0.3s; }
@keyframes typingBounce { 0%,60%,100% { transform: translateY(0); } 30% { transform: translateY(-5px); } }
.chat-quick { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.chat-quick button {
  background: #fff; border: 1px solid #0d9488; color: #0d9488;
  padding: 5px 12px; border-radius: 16px; font-size: 12px;
  cursor: pointer; transition: all 0.15s;
}
.chat-quick button:hover { background: #0d9488; color: #fff; }
.chat-footer { padding: 10px 12px; border-top: 1px solid #e2e8f0; background: #fff; display: flex; gap: 8px; align-items: center; }
.chat-input {
  flex: 1; border: 1px solid #e2e8f0; border-radius: 20px;
  padding: 9px 16px; font-size: 13.5px; outline: none;
  transition: border-color 0.15s;
}
.chat-input:focus { border-color: #0d9488; }
.chat-send {
  width: 38px; height: 38px; border-radius: 50%; border: none;
  background: #0d9488; color: #fff; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; transition: background 0.15s; flex-shrink: 0;
}
.chat-send:hover { background: #0f766e; }
.chat-send:disabled { background: #cbd5e1; cursor: not-allowed; }
.chat-disclaimer { font-size: 10px; color: #94a3b8; text-align: center; padding: 6px 12px; border-top: 1px solid #f1f5f9; background: #f8fafc; }
@media (max-width: 480px) {
  .chat-window { width: calc(100vw - 24px); right: 12px; bottom: 80px; height: calc(100vh - 100px); max-height: none; }
  .chat-fab { bottom: 16px; right: 16px; width: 50px; height: 50px; font-size: 22px; }
}