/* ============================================================
   普高光光电 官网样式 · 简约大气
   ============================================================ */
:root {
  --ink: #171b21;
  --text: #4c5563;
  --muted: #8b93a1;
  --accent: #b98f4e;
  --accent-dark: #a1783c;
  --accent-soft: rgba(185, 143, 78, 0.12);
  --line: #e7e4dd;
  --surface: #ffffff;
  --site-bg: #f7f6f2;
  --dark: #12161c;
  --dark-2: #1b222c;
  --radius: 14px;
  --shadow: 0 12px 34px rgba(23, 27, 33, 0.08);
  --header-h: 74px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--site-bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; }

/* 背景为图片时，内容区块加半透明白面板保证可读性 */
body.bg-image .section, body.bg-image .stats-strip, body.bg-image .contact-grid-wrap {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(6px);
}

.container { width: min(1180px, 92%); margin: 0 auto; }

/* ---------------- 顶部导航 ---------------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(231, 228, 221, 0.8);
  height: var(--header-h);
  display: flex; align-items: center;
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; color: var(--ink); letter-spacing: 0.06em; }
.brand-dot {
  width: 12px; height: 12px; border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #f0d9ae, var(--accent) 70%);
  box-shadow: 0 0 14px rgba(185, 143, 78, 0.65);
}
.nav { display: flex; align-items: center; gap: 38px; }
.nav a { font-size: 15px; color: var(--text); letter-spacing: 0.05em; position: relative; padding: 6px 0; transition: color 0.25s; }
.nav a::after {
  content: ""; position: absolute; left: 50%; bottom: 0; width: 0; height: 2px;
  background: var(--accent); transition: all 0.3s ease; transform: translateX(-50%);
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after, .nav a.active::after { width: 100%; }
.nav a.active { color: var(--ink); font-weight: 600; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px 0; transition: 0.3s; }

/* ---------------- 通用元件 ---------------- */
.eyebrow {
  font-size: 11px; letter-spacing: 0.42em; text-transform: uppercase;
  color: var(--accent); font-weight: 600; margin-bottom: 16px;
}
.sec-title { font-size: clamp(26px, 3.4vw, 38px); color: var(--ink); font-weight: 700; letter-spacing: 0.04em; line-height: 1.35; }
.sec-text { margin-top: 20px; font-size: 15.5px; color: var(--text); white-space: pre-line; }
.sec-head { text-align: center; max-width: 640px; margin: 0 auto clamp(40px, 6vw, 64px); }
.sec-head .sec-text { text-align: center; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 36px; font-size: 15px; letter-spacing: 0.12em;
  border-radius: 2px; border: 1px solid transparent; cursor: pointer;
  transition: all 0.3s ease;
}
.btn-solid { background: var(--accent); color: #fff; }
.btn-solid:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 10px 24px rgba(185, 143, 78, 0.35); }
.btn-ghost { border-color: rgba(255, 255, 255, 0.5); color: #fff; }
.btn-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, 0.1); }
.btn-line { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-line:hover { background: var(--ink); color: #fff; }
.btn-sm { padding: 9px 22px; font-size: 13px; }

/* ---------------- 首页 Hero ---------------- */
.hero {
  position: relative; min-height: 92vh;
  display: flex; align-items: center;
  background: linear-gradient(128deg, #0d1116 0%, #16202b 52%, #1d1c22 100%);
  overflow: hidden;
  padding: calc(var(--header-h) + 40px) 0 80px;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 620px 380px at 76% 26%, rgba(185, 143, 78, 0.28), transparent 62%),
    radial-gradient(ellipse 420px 300px at 12% 88%, rgba(72, 100, 130, 0.22), transparent 60%);
  pointer-events: none;
}
.hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: 0; transition: opacity 0.6s; }
.hero-bg.has-img { opacity: 1; }
.hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(13, 17, 22, 0.45), rgba(13, 17, 22, 0.72));
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 2; max-width: 820px; }
.hero .eyebrow { color: #d8b878; }
.hero h1 {
  color: #fff; font-size: clamp(34px, 5.4vw, 62px); font-weight: 700;
  letter-spacing: 0.06em; line-height: 1.28; white-space: pre-line; margin: 6px 0 22px;
}
.hero-sub { color: rgba(255, 255, 255, 0.72); font-size: clamp(15px, 1.6vw, 18px); max-width: 620px; line-height: 2; }
.hero-actions { display: flex; gap: 18px; margin-top: 44px; flex-wrap: wrap; }

/* ---------------- 数据统计 ---------------- */
.stats-strip { position: relative; z-index: 3; padding: 0; }
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow);
  transform: translateY(-56px); margin-bottom: -20px;
}
.stat-cell { background: var(--surface); padding: 34px 20px; text-align: center; }
.stat-num { font-size: clamp(30px, 3.4vw, 42px); font-weight: 700; color: var(--ink); letter-spacing: 0.02em; }
.stat-num em { font-style: normal; color: var(--accent); }
.stat-label { margin-top: 6px; font-size: 13.5px; color: var(--muted); letter-spacing: 0.22em; }

/* ---------------- 通用区块 ---------------- */
.section { padding: clamp(64px, 9vw, 108px) 0; }

/* 公司简介 */
.intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(36px, 6vw, 84px); align-items: center; }
.intro-media {
  position: relative; aspect-ratio: 4 / 3.1; border-radius: var(--radius);
  overflow: hidden; background: linear-gradient(135deg, #1a2430, #2b2a26 60%, #403427);
  box-shadow: var(--shadow);
}
.intro-media img { width: 100%; height: 100%; object-fit: cover; }
.intro-media .media-ph {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
}
.intro-media .media-ph svg { width: 76px; height: 76px; opacity: 0.9; }
.intro-media::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse 300px 200px at 70% 30%, rgba(216, 184, 120, 0.25), transparent 65%);
}
.btn-line.margin-top { margin-top: 34px; }

/* 优势 */
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.feature-card {
  background: var(--surface); border-radius: var(--radius); padding: 38px 30px;
  border: 1px solid var(--line); position: relative; overflow: hidden;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}
.feature-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), rgba(185, 143, 78, 0.15));
  transform: scaleX(0); transform-origin: left; transition: transform 0.4s ease;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.feature-card:hover::before { transform: scaleX(1); }
.feature-idx { font-size: 13px; color: var(--accent); letter-spacing: 0.3em; font-weight: 600; }
.feature-card h3 { margin: 14px 0 10px; font-size: 19px; color: var(--ink); letter-spacing: 0.05em; }
.feature-card p { font-size: 14px; color: var(--muted); line-height: 1.9; }

/* ---------------- 产品卡片 ---------------- */
.products-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.product-card {
  background: var(--surface); border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); transition: transform 0.35s ease, box-shadow 0.35s ease;
  display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.product-img { aspect-ratio: 4 / 3; position: relative; background: linear-gradient(135deg, #1c2632, #2c2b26 55%, #3c3226); overflow: hidden; }
.product-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.product-card:hover .product-img img { transform: scale(1.05); }
.product-img .ph {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 10px;
}
.product-img .ph svg { width: 52px; height: 52px; opacity: 0.85; }
.product-img .ph span { font-size: 11px; letter-spacing: 0.34em; color: rgba(255, 255, 255, 0.5); text-transform: uppercase; }
.product-body { padding: 24px 24px 28px; flex: 1; display: flex; flex-direction: column; }
.product-cat {
  display: inline-block; align-self: flex-start; font-size: 11.5px; letter-spacing: 0.18em;
  color: var(--accent); background: var(--accent-soft); border-radius: 100px; padding: 4px 12px; margin-bottom: 12px;
}
.product-body h3 { font-size: 17.5px; color: var(--ink); letter-spacing: 0.04em; }
.product-body p { margin-top: 8px; font-size: 13.5px; color: var(--muted); line-height: 1.85; }

/* 产品筛选 */
.filter-bar { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-bottom: clamp(34px, 5vw, 54px); }
.filter-btn {
  padding: 9px 26px; font-size: 14px; letter-spacing: 0.1em; border-radius: 100px;
  border: 1px solid var(--line); background: var(--surface); color: var(--text); cursor: pointer;
  transition: all 0.25s ease;
}
.filter-btn:hover { border-color: var(--accent); color: var(--accent); }
.filter-btn.active { background: var(--ink); border-color: var(--ink); color: #fff; }

/* ---------------- 产品系列详情（三级体系） ---------------- */
.product-card.clickable { cursor: pointer; }
.product-card.clickable:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.series-more {
  margin-top: auto; padding-top: 16px; font-size: 12.5px; letter-spacing: 0.14em;
  color: var(--accent); display: inline-flex; align-items: center; gap: 7px;
}
.series-more i { font-style: normal; transition: transform 0.3s ease; }
.product-card.clickable:hover .series-more i { transform: translateX(5px); }
.product-card-link { display: block; }
.product-card-link .product-card { height: 100%; }

.series-back {
  display: inline-flex; align-items: center; gap: 9px;
  margin-bottom: clamp(28px, 4vw, 44px); padding: 10px 24px;
  font-size: 14px; letter-spacing: 0.1em; border-radius: 100px;
  border: 1px solid var(--line); background: var(--surface); color: var(--text); cursor: pointer;
  transition: all 0.25s ease;
}
.series-back:hover { border-color: var(--accent); color: var(--accent); transform: translateX(-3px); }
.series-head { text-align: center; max-width: 640px; margin: 0 auto clamp(36px, 5vw, 56px); }
.series-head .eyebrow { margin-bottom: 12px; }
.series-head h2 { font-size: clamp(26px, 3.4vw, 38px); color: var(--ink); font-weight: 700; letter-spacing: 0.06em; }
.series-head p { margin-top: 16px; font-size: 15px; color: var(--muted); line-height: 2; }

.models-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.model-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: transform 0.35s ease, box-shadow 0.35s ease;
  display: flex; flex-direction: column;
}
.model-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.model-img { aspect-ratio: 4 / 3; position: relative; background: linear-gradient(135deg, #1c2632, #2c2b26 55%, #3c3226); overflow: hidden; }
.model-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.model-card:hover .model-img img { transform: scale(1.05); }
.model-img .ph { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; }
.model-img .ph svg { width: 46px; height: 46px; opacity: 0.85; }
.model-body { padding: 20px 22px 24px; flex: 1; }
.model-body h3 { font-size: 16px; color: var(--ink); letter-spacing: 0.05em; }
.model-specs { margin-top: 9px; font-size: 13px; color: var(--muted); line-height: 1.95; white-space: pre-line; }

.series-cta {
  margin-top: clamp(36px, 5vw, 52px); text-align: center;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px; display: flex; align-items: center; justify-content: center; gap: 20px; flex-wrap: wrap;
}
.series-cta p { color: var(--text); font-size: 14.5px; letter-spacing: 0.04em; }

/* ---------------- 明星案例 ---------------- */
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cases-empty { grid-column: 1 / -1; text-align: center; color: var(--muted); padding: 40px 0; font-size: 14.5px; letter-spacing: 0.08em; }
.case-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; cursor: pointer; display: flex; flex-direction: column;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.case-card:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.case-img { aspect-ratio: 16 / 10; position: relative; overflow: hidden; background: linear-gradient(135deg, #1c2632, #2c2b26 55%, #3c3226); }
.case-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.case-card:hover .case-img img { transform: scale(1.05); }
.case-img .ph { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 10px; }
.case-img .ph svg { width: 48px; height: 48px; opacity: 0.85; }
.case-img .ph span { font-size: 11px; letter-spacing: 0.34em; color: rgba(255, 255, 255, 0.5); }
.case-img-tag {
  position: absolute; left: 14px; top: 14px; z-index: 2;
  font-size: 11.5px; letter-spacing: 0.14em; color: #fff;
  background: rgba(18, 22, 28, 0.55); backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.22); border-radius: 100px; padding: 5px 14px;
}
.case-body { padding: 22px 24px 26px; flex: 1; display: flex; flex-direction: column; }
.case-body h3 { font-size: 17px; color: var(--ink); letter-spacing: 0.04em; line-height: 1.55; }
.case-meta { margin-top: 8px; font-size: 12.5px; color: var(--accent); letter-spacing: 0.12em; }
.case-summary { margin-top: 10px; font-size: 13.5px; color: var(--muted); line-height: 1.85; }
.case-body .series-more { margin-top: auto; }

/* 案例详情弹窗 */
.case-modal { position: fixed; inset: 0; z-index: 200; display: none; align-items: center; justify-content: center; padding: 4vh 4vw; }
.case-modal.open { display: flex; }
.case-modal-mask { position: absolute; inset: 0; background: rgba(13, 17, 22, 0.62); backdrop-filter: blur(6px); }
.case-modal-box {
  position: relative; z-index: 2; width: min(980px, 100%); max-height: 92vh; overflow-y: auto;
  background: var(--surface); border-radius: var(--radius); box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
  display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); animation: caseModalIn 0.35s ease;
}
@keyframes caseModalIn { from { opacity: 0; transform: translateY(28px) scale(0.98); } to { opacity: 1; transform: none; } }
.case-modal-close {
  position: absolute; top: 14px; right: 14px; z-index: 5;
  width: 38px; height: 38px; border-radius: 50%; border: none; cursor: pointer;
  background: rgba(18, 22, 28, 0.55); color: #fff; font-size: 22px; line-height: 1;
  transition: background 0.25s ease;
}
.case-modal-close:hover { background: var(--accent); }
.case-modal-gallery { padding: 22px; min-width: 0; background: linear-gradient(160deg, #161c24, #23211c); border-radius: var(--radius) 0 0 var(--radius); }
.case-gallery-main { aspect-ratio: 4 / 3; width: 100%; max-width: 100%; border-radius: 10px; overflow: hidden; background: rgba(255, 255, 255, 0.06); }
.case-gallery-main img { width: 100%; height: 100%; object-fit: cover; }
.case-gallery-ph { display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 12px; height: 100%; }
.case-gallery-ph svg { width: 60px; height: 60px; opacity: 0.8; }
.case-gallery-ph span { font-size: 12px; letter-spacing: 0.28em; color: rgba(255, 255, 255, 0.45); }
.case-gallery-thumbs { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.case-thumb {
  width: 68px; height: 50px; border-radius: 8px; overflow: hidden; cursor: pointer; padding: 0;
  border: 2px solid transparent; background: none; opacity: 0.65; transition: all 0.25s ease;
}
.case-thumb img { width: 100%; height: 100%; object-fit: cover; }
.case-thumb:hover { opacity: 1; }
.case-thumb.active { border-color: var(--accent); opacity: 1; }
.case-gallery-cap { margin-top: 14px; font-size: 11.5px; letter-spacing: 0.24em; color: rgba(255, 255, 255, 0.4); }
.case-modal-body { padding: 34px 32px; min-width: 0; }
.case-modal-body h3 { margin-top: 14px; font-size: 21px; color: var(--ink); letter-spacing: 0.04em; line-height: 1.5; }
.case-modal-body .case-meta { margin-top: 8px; }
.case-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.case-tags span {
  font-size: 12px; color: var(--accent-dark); background: var(--accent-soft);
  border-radius: 100px; padding: 4px 13px; letter-spacing: 0.06em;
}
.case-desc { margin-top: 18px; font-size: 14px; color: var(--text); line-height: 2; white-space: pre-line; max-height: 300px; overflow-y: auto; }
.case-modal-body .btn { margin-top: 24px; }

/* ---------------- CTA 横幅 ---------------- */
.cta-band {
  background: linear-gradient(120deg, #12161c, #1c2733);
  padding: clamp(64px, 8vw, 96px) 0; position: relative; overflow: hidden;
}
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse 520px 260px at 82% 20%, rgba(185, 143, 78, 0.3), transparent 60%);
}
.cta-inner { position: relative; z-index: 2; display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-inner h2 { color: #fff; font-size: clamp(24px, 3vw, 34px); letter-spacing: 0.08em; font-weight: 700; }
.cta-inner p { color: rgba(255, 255, 255, 0.6); margin-top: 10px; font-size: 15px; }

/* ---------------- 内页 Banner ---------------- */
.page-banner {
  position: relative;
  padding: calc(var(--header-h) + clamp(70px, 10vw, 120px)) 0 clamp(64px, 9vw, 100px);
  background: linear-gradient(128deg, #0d1116, #182430 55%, #201f25);
  overflow: hidden;
}
.page-banner::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse 560px 300px at 78% 22%, rgba(185, 143, 78, 0.26), transparent 62%);
}
.page-banner .banner-bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.page-banner .banner-veil { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(13, 17, 22, 0.55), rgba(13, 17, 22, 0.78)); }
.page-banner .container { position: relative; z-index: 2; }
.page-banner h1 { color: #fff; font-size: clamp(30px, 4vw, 46px); letter-spacing: 0.14em; font-weight: 700; }
.page-banner .crumb { margin-top: 14px; color: rgba(255, 255, 255, 0.55); font-size: 12px; letter-spacing: 0.4em; text-transform: uppercase; }

/* ---------------- 关于我们 ---------------- */
.about-intro { text-align: center; max-width: 860px; margin: 0 auto; }
.about-sections { display: flex; flex-direction: column; gap: clamp(48px, 7vw, 90px); }
.about-row { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(36px, 6vw, 80px); align-items: center; }
.about-row:nth-child(even) .about-media { order: 2; }
.about-media {
  aspect-ratio: 16 / 10.5; border-radius: var(--radius); overflow: hidden;
  background: linear-gradient(135deg, #1a2430, #2b2a26 60%, #403427); box-shadow: var(--shadow);
  position: relative;
}
.about-media img { width: 100%; height: 100%; object-fit: cover; }
.about-media .media-ph { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; }
.about-media .media-ph svg { width: 64px; height: 64px; opacity: 0.9; }
.about-media::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse 280px 180px at 72% 28%, rgba(216, 184, 120, 0.22), transparent 65%);
}
.about-row .eyebrow { margin-bottom: 12px; }
.about-row h3 { font-size: clamp(21px, 2.4vw, 27px); color: var(--ink); letter-spacing: 0.06em; margin-bottom: 16px; }
.about-row .sec-text { margin-top: 0; font-size: 15px; }

/* ---------------- 联系我们 ---------------- */
.contact-grid-wrap { padding: clamp(56px, 8vw, 96px) 0; }
.contact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.contact-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 40px 28px; text-align: center; transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.contact-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.contact-icon {
  width: 54px; height: 54px; margin: 0 auto 20px; border-radius: 50%;
  background: var(--accent-soft); display: flex; align-items: center; justify-content: center;
}
.contact-icon svg { width: 24px; height: 24px; stroke: var(--accent); }
.contact-card h3 { font-size: 15px; color: var(--ink); letter-spacing: 0.2em; margin-bottom: 10px; }
.contact-card p { font-size: 14.5px; color: var(--text); word-break: break-all; }
.contact-note {
  margin-top: 26px; text-align: center; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: clamp(36px, 5vw, 56px) 30px; color: var(--text);
}
.contact-note strong { color: var(--ink); font-size: 18px; letter-spacing: 0.08em; display: block; margin-bottom: 10px; }

/* ---------------- 页脚 ---------------- */
.site-footer { background: var(--dark); color: rgba(255, 255, 255, 0.55); }
.footer-main { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding: clamp(52px, 7vw, 80px) 0 44px; }
.footer-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-size: 20px; font-weight: 700; letter-spacing: 0.06em; margin-bottom: 18px; }
.footer-slogan { font-size: 14px; line-height: 2; max-width: 340px; }
.footer-col h4 { color: #fff; font-size: 14px; letter-spacing: 0.24em; margin-bottom: 20px; font-weight: 600; }
.footer-col li { margin-bottom: 11px; font-size: 14px; }
.footer-col a { transition: color 0.25s; }
.footer-col a:hover { color: #d8b878; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.09);
  padding: 22px 0; text-align: center; font-size: 12.5px; color: rgba(255, 255, 255, 0.35);
}
.footer-bottom a { color: inherit; }
.footer-bottom a:hover { color: #d8b878; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1020px) {
  .features-grid, .products-grid, .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .models-grid, .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); transform: translateY(-36px); }
  .case-modal-box { grid-template-columns: 1fr; }
  .case-modal-gallery { border-radius: var(--radius) var(--radius) 0 0; }
}
@media (max-width: 760px) {
  .nav {
    position: fixed; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; gap: 0; background: #fff;
    border-bottom: 1px solid var(--line);
    max-height: 0; overflow: hidden; transition: max-height 0.35s ease;
  }
  .nav.open { max-height: 320px; }
  .nav a { padding: 15px 8%; width: 100%; }
  .nav a::after { display: none; }
  .nav-toggle { display: block; }
  .intro-grid, .about-row { grid-template-columns: 1fr; }
  .about-row:nth-child(even) .about-media { order: 0; }
  .cta-inner { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 520px) {
  .features-grid, .products-grid, .contact-grid { grid-template-columns: 1fr; }
  .models-grid, .cases-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .hero { min-height: 86vh; }
  .hero-actions .btn { width: 100%; }
  .case-modal { padding: 0; }
  .case-modal-box { max-height: 100vh; border-radius: 0; width: 100%; }
  .case-modal-body { padding: 26px 22px; }
}

/* 淡入动画 */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }