/* ===== 深圳市小华五金厂 · 设计令牌（与建站方案第六章一致） ===== */
:root {
  --color-primary: #1d3557;
  --color-primary-dark: #16283f;
  --color-ink: #16222f;
  --color-accent: #f77f00;
  --color-accent-dark: #d96f00;
  --color-steel: #46617a;
  --color-line: #dde4ec;
  --color-bg: #ffffff;
  --color-bg-alt: #f3f6fa;
  --color-bg-deep: #101a26;
  --color-text: #2c3a4a;
  --color-muted: #6b7a8c;
  --radius: 10px;
  --shadow: 0 10px 30px rgba(16, 26, 38, .08);
  --shadow-lg: 0 18px 48px rgba(16, 26, 38, .14);
  --wrap: 1180px;
  --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: var(--font-family); color: var(--color-text); line-height: 1.7; background: var(--color-bg); }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--color-accent-dark); }
h1, h2, h3 { color: var(--color-ink); line-height: 1.3; margin: 0 0 .5em; }
h1 { font-size: clamp(1.8rem, 3.6vw, 2.7rem); }
h2 { font-size: clamp(1.4rem, 2.6vw, 1.9rem); }
h3 { font-size: 1.08rem; }
p { margin: 0 0 1em; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.wrap-narrow { max-width: 820px; }
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.hide-sm { display: inline; }

/* ===== 按钮 ===== */
.btn { display: inline-block; padding: 12px 26px; border-radius: 6px; font-weight: 600; border: 2px solid transparent; cursor: pointer; transition: all .18s ease; font-size: .98rem; }
.btn-lg { padding: 14px 32px; font-size: 1.05rem; }
.btn-block { display: block; width: 100%; text-align: center; }
.btn-accent { background: var(--color-accent); color: #fff; }
.btn-accent:hover { background: var(--color-accent-dark); color: #fff; transform: translateY(-1px); box-shadow: 0 8px 20px rgba(247, 127, 0, .35); }
.btn-ghost { border-color: rgba(255,255,255,.7); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.12); color: #fff; }
.btn-outline { border-color: var(--color-primary); color: var(--color-primary); background: transparent; }
.btn-outline:hover { background: var(--color-primary); color: #fff; }
.section-cta { margin-top: 26px; }

/* ===== 顶部条 ===== */
.topbar { background: var(--color-bg-deep); color: #c9d5e2; font-size: .82rem; }
.topbar-inner { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 6px 20px; flex-wrap: wrap; }
.topbar a { color: #e8eef5; }
.topbar-contact a:hover { color: var(--color-accent); }

/* ===== 头部导航（桌面悬停下拉 / 移动汉堡手风琴） ===== */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.97); border-bottom: 1px solid var(--color-line); }
.header-inner { display: flex; align-items: center; gap: 22px; padding: 10px 20px; }
.brand { display: flex; align-items: center; gap: 10px; margin-right: auto; }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { color: var(--color-ink); font-size: 1.12rem; letter-spacing: .5px; }
.brand-text small { color: var(--color-muted); font-size: .74rem; }
.nav-list { display: flex; list-style: none; margin: 0; padding: 0; gap: 4px; }
.nav-list > li { position: relative; }
.nav-list > li > a { display: block; padding: 14px 13px; font-size: .95rem; font-weight: 500; color: var(--color-text); border-bottom: 3px solid transparent; }
.nav-list > li > a:hover, .nav-list > li > a.active { color: var(--color-primary); border-bottom-color: var(--color-accent); }
.caret { display: inline-block; margin-left: 4px; border: 4px solid transparent; border-top-color: currentColor; vertical-align: middle; }
.has-sub .sub-list { position: absolute; top: 100%; left: 0; min-width: 240px; background: #fff; border: 1px solid var(--color-line); border-radius: 0 0 8px 8px; box-shadow: var(--shadow); list-style: none; margin: 0; padding: 6px 0; opacity: 0; visibility: hidden; transform: translateY(6px); transition: all .18s ease; }
.has-sub:hover .sub-list, .has-sub:focus-within .sub-list { opacity: 1; visibility: visible; transform: translateY(0); }
.sub-list a { display: block; padding: 9px 18px; font-size: .9rem; }
.sub-list a:hover { background: var(--color-bg-alt); }
.header-cta { white-space: nowrap; }
.nav-toggle { display: none; background: none; border: 0; padding: 10px; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--color-ink); margin: 5px 0; transition: .2s; }

/* ===== Hero ===== */
.hero { position: relative; color: #eaf0f7; background: linear-gradient(115deg, var(--color-bg-deep) 30%, var(--color-primary) 80%); overflow: hidden; }
.hero-bg { position: absolute; inset: 0; opacity: .22; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-inner { position: relative; display: grid; grid-template-columns: 1.6fr 1fr; gap: 40px; align-items: center; padding: 74px 20px 80px; }
.eyebrow { text-transform: uppercase; letter-spacing: 2px; font-size: .78rem; font-weight: 700; color: var(--color-accent); margin-bottom: 10px; }
.hero h1 { color: #fff; }
.hero-lead { max-width: 620px; color: #cfdae6; font-size: 1.05rem; }
.hero-lead strong { color: #fff; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin: 26px 0 22px; }
.hero-points { display: flex; gap: 22px; list-style: none; margin: 0; padding: 0; flex-wrap: wrap; font-size: .9rem; color: #b6c5d4; }
.hero-points strong { color: #fff; }
.hero-card { background: rgba(255,255,255,.97); color: var(--color-text); border-radius: var(--radius); padding: 26px 24px; box-shadow: var(--shadow-lg); }
.hero-card h2 { font-size: 1.16rem; }
.hero-card p { font-size: .92rem; color: var(--color-muted); }
.hero-card .btn { margin-top: 10px; background: var(--color-primary); color: #fff; }
.hero-card .btn:hover { background: var(--color-primary-dark); color: #fff; }
.hero-card-note { text-align: center; font-size: .8rem !important; margin-top: 10px; margin-bottom: 0 !important; }

/* ===== 通用 section ===== */
.section { padding: 72px 0; }
.section-alt { background: var(--color-bg-alt); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 42px; }
.section-head.left { text-align: left; margin-left: 0; }
.section-sub { color: var(--color-muted); }

/* ===== 产品卡 ===== */
.card { background: #fff; border: 1px solid var(--color-line); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; transition: transform .18s ease, box-shadow .18s ease; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card img { width: 100%; height: 168px; object-fit: cover; }
.card-body { padding: 18px 18px 20px; display: flex; flex-direction: column; flex: 1; }
.card-body h3 a:hover { color: var(--color-accent-dark); }
.card-body p { font-size: .9rem; color: var(--color-muted); flex: 1; }
.card-specs { list-style: none; margin: 0 0 12px; padding: 10px 0 0; border-top: 1px dashed var(--color-line); display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: .78rem; color: var(--color-steel); }
.card-specs li { position: relative; padding-left: 12px; }
.card-specs li::before { content: ""; position: absolute; left: 0; top: .55em; width: 6px; height: 6px; border-radius: 50%; background: var(--color-accent); }
.card-link { font-weight: 600; font-size: .9rem; color: var(--color-primary); }

/* ===== 数字条 ===== */
.stats-band { background: linear-gradient(180deg, var(--color-primary), var(--color-primary-dark)); color: #fff; padding: 44px 0 16px; }
.stats-grid { text-align: center; }
.stat strong { font-size: clamp(1.8rem, 3.2vw, 2.5rem); color: #fff; display: block; line-height: 1.15; }
.stat strong span { font-size: 1rem; color: var(--color-accent); margin-left: 2px; }
.stat p { color: #b9c8da; font-size: .88rem; margin: 4px 0 0; }
.stats-note { color: #8fa3b8; font-size: .74rem; margin-top: 26px; text-align: center; }

/* ===== 流程步骤 ===== */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.step { background: #fff; border: 1px solid var(--color-line); border-radius: var(--radius); padding: 20px 16px; position: relative; }
.step::after { content: "→"; position: absolute; right: -15px; top: 50%; transform: translateY(-50%); color: var(--color-accent); font-weight: 700; }
.step:last-child::after { content: ""; }
.step-no { display: inline-flex; width: 30px; height: 30px; border-radius: 50%; background: var(--color-primary); color: #fff; align-items: center; justify-content: center; font-weight: 700; margin-bottom: 10px; }
.step h3 { font-size: 1rem; margin-bottom: 6px; }
.step p { font-size: .84rem; color: var(--color-muted); margin-bottom: 8px; }
.step em { font-style: normal; font-size: .78rem; color: var(--color-accent-dark); font-weight: 600; }

/* ===== 双栏 ===== */
.why-grid { align-items: start; gap: 48px; }
.check-list { list-style: none; margin: 0 0 8px; padding: 0; }
.check-list li { padding: 10px 0 10px 34px; border-bottom: 1px solid var(--color-line); position: relative; font-size: .95rem; }
.check-list li:last-child { border-bottom: 0; }
.check-list li::before { content: "✓"; position: absolute; left: 4px; top: 10px; width: 20px; height: 20px; border-radius: 50%; background: rgba(247,127,0,.14); color: var(--color-accent-dark); font-weight: 700; font-size: .8rem; display: flex; align-items: center; justify-content: center; }
.news-list { list-style: none; margin: 0; padding: 0; }
.news-list li + li { border-top: 1px solid var(--color-line); }
.news-list a { display: flex; gap: 16px; padding: 16px 4px; }
.news-list time { flex: 0 0 54px; color: var(--color-muted); font-size: .82rem; padding-top: 4px; font-variant-numeric: tabular-nums; }
.news-list h3 { font-size: .98rem; margin-bottom: 4px; }
.news-list a:hover h3 { color: var(--color-accent-dark); }
.news-list p { font-size: .84rem; color: var(--color-muted); margin: 0; }

/* ===== FAQ 手风琴 ===== */
.accordion details { background: #fff; border: 1px solid var(--color-line); border-radius: 8px; margin-bottom: 12px; overflow: hidden; }
.accordion summary { cursor: pointer; padding: 16px 46px 16px 20px; font-weight: 600; color: var(--color-ink); position: relative; list-style: none; }
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after { content: "+"; position: absolute; right: 18px; top: 50%; transform: translateY(-50%); width: 24px; height: 24px; border-radius: 50%; background: var(--color-bg-alt); color: var(--color-primary); display: flex; align-items: center; justify-content: center; font-weight: 700; }
.accordion details[open] summary::after { content: "−"; background: var(--color-accent); color: #fff; }
.acc-body { padding: 0 20px 16px; color: var(--color-muted); font-size: .93rem; }
.acc-body p { margin: 0; }

/* ===== 询价 ===== */
.inquiry { background: linear-gradient(120deg, var(--color-bg-deep), var(--color-primary) 75%); color: #dce6f0; padding: 72px 0; }
.inquiry h2 { color: #fff; }
.inquiry .eyebrow { color: var(--color-accent); }
.inquiry-copy p { max-width: 460px; }
.inquiry-contact { list-style: none; margin: 22px 0 0; padding: 0; font-size: .92rem; }
.inquiry-contact li { padding: 6px 0; }
.inquiry-contact a { color: #fff; border-bottom: 1px dashed rgba(255,255,255,.4); }
.inquiry-contact a:hover { color: var(--color-accent); }
.inquiry-form { background: #fff; border-radius: var(--radius); padding: 28px 26px; box-shadow: var(--shadow-lg); color: var(--color-text); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.inquiry-form label { display: block; font-size: .86rem; font-weight: 600; color: var(--color-ink); margin-bottom: 14px; }
.req { color: #d64545; }
.inquiry-form input, .inquiry-form select, .inquiry-form textarea { width: 100%; margin-top: 6px; padding: 11px 12px; border: 1px solid var(--color-line); border-radius: 6px; font-family: inherit; font-size: .92rem; color: var(--color-text); background: #fbfcfe; }
.inquiry-form input:focus, .inquiry-form select:focus, .inquiry-form textarea:focus { outline: none; border-color: var(--color-accent); box-shadow: 0 0 0 3px rgba(247,127,0,.15); background: #fff; }
.inquiry-form textarea { resize: vertical; }
.inquiry-form button { margin-top: 6px; }
.form-note { font-size: .76rem; color: var(--color-muted); margin: 12px 0 0; }
.form-ok { background: #e8f7ec; border: 1px solid #bfe6c9; color: #20693a; padding: 16px; border-radius: 8px; font-size: .92rem; }

/* ===== 页脚 ===== */
.site-footer { background: var(--color-bg-deep); color: #93a5b8; font-size: .9rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; padding: 56px 20px 40px; }
.footer-logo { color: #fff; font-weight: 700; font-size: 1.05rem; }
.footer-grid h3 { color: #fff; font-size: .95rem; margin-bottom: 12px; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { padding: 4px 0; }
.footer-grid a:hover { color: var(--color-accent); }
.footer-addr { font-size: .82rem; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 16px 0; font-size: .78rem; }

/* ===== 响应式（≤860px 汉堡+手风琴；≤620px 单列） ===== */
@media (max-width: 1080px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .step:nth-child(3)::after { content: ""; }
}
@media (max-width: 860px) {
  .hide-sm { display: none; }
  .main-nav { position: fixed; inset: 0 0 0 auto; width: min(320px, 86vw); background: #fff; transform: translateX(100%); transition: transform .25s ease; padding: 76px 20px 30px; box-shadow: var(--shadow-lg); z-index: 60; overflow-y: auto; }
  .main-nav.open { transform: translateX(0); }
  .nav-list { flex-direction: column; gap: 0; }
  .nav-list > li { border-bottom: 1px solid var(--color-line); }
  .nav-list > li > a { border-bottom: 0; padding: 14px 6px; }
  .has-sub .sub-list { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: 0; display: none; padding: 0 0 8px 16px; }
  .has-sub.open .sub-list { display: block; }
  .nav-toggle { display: block; position: relative; z-index: 70; }
  body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
  body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .nav-backdrop { position: fixed; inset: 0; background: rgba(16,26,38,.45); z-index: 55; }
  .header-cta { display: none; }
  .hero-inner { grid-template-columns: 1fr; padding: 56px 20px 60px; gap: 30px; }
  .grid-2 { grid-template-columns: 1fr; }
  .why-grid, .inquiry-grid { gap: 34px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 620px) {
  .grid-4, .steps { grid-template-columns: 1fr; }
  .step::after { content: "↓" !important; right: auto; left: 50%; top: auto; bottom: -20px; transform: translateX(-50%); }
  .step:last-child::after { content: "" !important; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .section { padding: 54px 0; }
  .topbar-note { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

/* ===== 内页补充样式 ===== */
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.brand-mark { display: inline-flex; align-items: center; }
.brand svg { display: block; }
.hero-copy { position: relative; }
.news-col { position: relative; }
.footer-brand p { margin-bottom: 0; }

/* 内页页头 */
.page-hero { position: relative; background: var(--color-primary-dark); color: #b0bcd4; overflow: hidden; }
.page-hero h1 { color: #fff; margin-bottom: .3em; }
.hero-bg-sm { position: absolute; inset: 0; opacity: .18; }
.hero-bg-sm img { width: 100%; height: 100%; object-fit: cover; }
.hero-inner-sm { position: relative; padding: 64px 20px 58px; }
.hero-inner-sm p { margin-bottom: 0; }

/* 规格表 */
.spec-table { width: 100%; border-collapse: separate; border-spacing: 0; background: #fff; border: 1px solid var(--color-line); border-radius: var(--radius); overflow: hidden; font-size: .92rem; }
.spec-table th, .spec-table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--color-line); }
.spec-table thead th { background: var(--color-primary); color: #fff; font-weight: 600; white-space: nowrap; }
.spec-table tbody tr:nth-child(even) { background: var(--color-bg-alt); }
.spec-table tbody tr:last-child td { border-bottom: 0; }

/* 新闻列表 */
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.news-card .card-body p { margin-bottom: 0; }
.news-card time { font-variant-numeric: tabular-nums; }

/* 联系页 */
.big-tel { margin-bottom: 6px; }

@media (max-width: 1080px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .grid-3 { grid-template-columns: 1fr; }
}