/* =========================================================
   天诺影像 TIANNUO IMAGE
   Apple 风格深色品牌展示站 · 共享样式
   ========================================================= */

/* ---------- 变量 ---------- */
:root {
  --bg: #ffffff;
  --bg-soft: #f5f5f7;
  --surface: #ffffff;
  --surface-2: #f5f5f7;
  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.14);
  --text: #1d1d1f;
  --text-2: #6e6e73;
  --text-3: #86868b;
  --gold: #0071e3;
  --gold-bright: #2997ff;
  --gold-soft: rgba(0, 113, 227, 0.12);
  --radius: 26px;
  --radius-sm: 18px;
  --nav-h: 136px;
  --max-w: 1200px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --accent: var(--gold);
  --accent-soft: var(--gold-soft);
}

/* 品牌识别色（浅色适配） */
.brand-leica      { --accent: #e25c46; --accent-soft: rgba(226, 92, 70, .12); }
.brand-hasselblad { --accent: #6e6e73; --accent-soft: rgba(110, 110, 115, .12); }
.brand-zeiss      { --accent: #5b8cff; --accent-soft: rgba(91, 140, 255, .12); }
.brand-dji        { --accent: #1d9bf0; --accent-soft: rgba(29, 155, 240, .12); }

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.6;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }

::selection { background: var(--gold-soft); color: #0055a8; }

:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; border-radius: 4px; }

/* ---------- 布局工具 ---------- */
.container { width: min(var(--max-w), 100% - 48px); margin-inline: auto; }
.section { padding: 110px 0; position: relative; }
.section--tint { background: linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 18px;
}
.eyebrow::before { content: ""; width: 28px; height: 1px; background: var(--accent); opacity: .7; }

.section-title {
  font-size: clamp(1.9rem, 4.2vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.022em;
  line-height: 1.12;
  margin: 0 0 16px;
}
.section-sub {
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  color: var(--text-2);
  max-width: 620px;
  margin: 0;
}
.section-head { margin-bottom: 64px; }
.section-head--center { text-align: center; }
.section-head--center .section-sub { margin-inline: auto; }
.section-head--center .eyebrow { justify-content: center; }
.section-head--center .eyebrow::before { display: none; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 980px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.01em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .35s var(--ease), background .35s var(--ease), border-color .35s var(--ease), box-shadow .35s var(--ease);
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn--gold { background: var(--gold); color: #fff; box-shadow: 0 6px 24px rgba(0,113,227,.28); }
.btn--gold:hover { background: var(--gold-bright); transform: translateY(-1px); box-shadow: 0 10px 32px rgba(0,113,227,.38); }
.btn--ghost { background: rgba(255,255,255,.8); color: var(--text); border-color: var(--border-strong); backdrop-filter: blur(12px); }
.btn--ghost:hover { background: #fff; transform: translateY(-1px); box-shadow: 0 6px 18px rgba(0,0,0,.08); }
.btn--sm { padding: 9px 20px; font-size: 14px; }
.btn--lg { padding: 16px 36px; font-size: 17px; }

/* ---------- 导航 ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: saturate(180%) blur(22px);
  backdrop-filter: saturate(180%) blur(22px);
  border-bottom: 1px solid var(--border);
  transition: background .4s var(--ease), border-color .4s var(--ease);
}
.nav.scrolled { background: rgba(255, 255, 255, 0.86); border-color: var(--border-strong); }
.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-logo { display: flex; align-items: center; gap: 12px; }
.logo-img {
  height: 104px; width: auto;
  display: block;
}
.nav .logo-img {
  height: 46px; width: auto;
}

.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  padding: 8px 14px;
  border-radius: 980px;
  font-size: 14.5px;
  color: var(--text-2);
  transition: color .3s var(--ease), background .3s var(--ease);
}
.nav-links a:hover { color: var(--text); background: rgba(0,0,0,.06); }
.nav-links a.active { color: var(--text); background: rgba(0,0,0,.08); font-weight: 600; }
.nav-links .nav-cta { background: var(--gold); color: #fff; font-weight: 600; }
.nav-links .nav-cta:hover { background: var(--gold-bright); color: #fff; }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  background: rgba(0,0,0,.04);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  width: 18px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .35s var(--ease), opacity .3s;
}
body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(3.5px) rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2) { transform: translateY(-3.5px) rotate(-45deg); }

/* ---------- Hero（首页 · 苹果风） ---------- */
.hero {
  position: relative;
  text-align: center;
  padding: calc(var(--nav-h) + 90px) 0 0;
  background: var(--bg);
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  opacity: .4;
}
@keyframes heroZoom { from { transform: scale(1.06); } to { transform: scale(1.02); } }
.hero-inner { position: relative; z-index: 2; max-width: 820px; margin-inline: auto; padding-bottom: 64px; }
.hero-slogan {
  margin: 0 0 18px;
  font-size: clamp(2.6rem, 6.5vw, 4.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
}
.hero-slogan em { font-style: normal; color: var(--gold); }
.hero-sub {
  font-size: clamp(1.02rem, 1.8vw, 1.28rem);
  color: var(--text-2);
  max-width: 600px;
  margin: 0 auto 40px;
}
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; }
.hero-photo {
  position: relative;
  width: min(var(--max-w), 100% - 48px);
  margin-inline: auto;
  border-radius: 32px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 30px 80px rgba(0,0,0,.14);
}
.hero-photo img { width: 100%; height: clamp(340px, 46vw, 620px); object-fit: cover; }
.hero-photo-cap {
  position: absolute; left: 22px; bottom: 22px;
  padding: 8px 16px;
  border-radius: 980px;
  background: rgba(29,29,31,.62);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  color: #fff;
  font-size: 13px;
  letter-spacing: .04em;
}

/* ---------- Hero 轮播 ---------- */
.carousel-track { position: relative; }
.carousel-slide {
  margin: 0;
  opacity: 0;
  visibility: hidden;
  position: absolute; inset: 0;
  transition: opacity .8s var(--ease), visibility .8s var(--ease);
}
.carousel-slide.is-active { opacity: 1; visibility: visible; position: relative; }
.carousel-dots {
  position: absolute;
  left: 50%; bottom: 18px;
  transform: translateX(-50%);
  display: flex; gap: 8px;
  z-index: 3;
}
.carousel-dots button {
  width: 9px; height: 9px;
  border-radius: 50%;
  border: none;
  padding: 0;
  background: rgba(255,255,255,.55);
  cursor: pointer;
  transition: background .3s, transform .3s;
}
.carousel-dots button.is-active { background: #fff; transform: scale(1.25); }
.carousel-arrow {
  position: absolute;
  top: 50%; transform: translateY(-50%);
  z-index: 3;
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.35);
  background: rgba(29,29,31,.35);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  color: #fff;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  transition: background .3s;
}
.carousel-arrow:hover { background: rgba(29,29,31,.6); }
.carousel-arrow--prev { left: 18px; }
.carousel-arrow--next { right: 18px; }
@media (max-width: 640px) {
  .carousel-arrow { display: none; }
}

/* ---------- 品牌矩阵 ---------- */
.brand-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.brand-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
  min-height: 460px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 28px;
  isolation: isolate;
  transition: transform .5s var(--ease), border-color .5s var(--ease), box-shadow .5s var(--ease);
}
.brand-card::before {
  content: "";
  position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(180deg, rgba(0,0,0,.06) 0%, rgba(0,0,0,.66) 72%, rgba(0,0,0,.86) 100%);
}
.brand-card:hover { transform: translateY(-8px); border-color: var(--border-strong); box-shadow: 0 30px 60px rgba(0,0,0,.16); }
.brand-card img.brand-card-bg {
  position: absolute; inset: 0; z-index: -2;
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 1.2s var(--ease);
}
.brand-card:hover img.brand-card-bg { transform: scale(1.06); }
.brand-card .b-tag {
  position: absolute; top: 24px; left: 24px;
  padding: 7px 14px;
  border-radius: 980px;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 34%, transparent);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .08em;
}
.brand-card h3 { margin: 0 0 6px; font-size: 1.7rem; letter-spacing: -0.02em; color: #fff; }
.brand-card .b-en { font-size: 12px; letter-spacing: .2em; text-transform: uppercase; color: var(--accent); margin-bottom: 12px; font-weight: 600; }
.brand-card p { margin: 0 0 22px; color: rgba(255,255,255,.82); font-size: 15px; }
.brand-card .b-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 15px; font-weight: 600; color: #fff;
  transition: color .3s;
}
.brand-card .b-link svg { transition: transform .3s var(--ease); }
.brand-card:hover .b-link { color: var(--accent); }
.brand-card:hover .b-link svg { transform: translateX(4px); }

/* ---------- 服务 ---------- */
.service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.service-card {
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 0 0 28px;
  overflow: hidden;
  transition: transform .45s var(--ease), border-color .45s var(--ease), background .45s var(--ease);
}
.service-card:hover { transform: translateY(-6px); border-color: rgba(0,113,227,.35); background: var(--surface-2); }
.svc-img { height: 168px; overflow: hidden; }
.svc-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease); }
.service-card:hover .svc-img img { transform: scale(1.07); }
.svc-body { padding: 26px 28px 0; }
.service-icon {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  border-radius: 14px;
  background: var(--gold-soft);
  color: var(--gold);
  margin-bottom: 22px;
}
.service-card h3 { margin: 0 0 10px; font-size: 1.15rem; letter-spacing: -0.01em; }
.service-card p { margin: 0; color: var(--text-2); font-size: 14.5px; }
.service-note {
  margin-top: 40px;
  display: flex; align-items: center; gap: 10px;
  font-size: 14px; color: var(--text-3);
}
.service-note .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--gold); flex: none; }

/* ---------- 时间轴 ---------- */
.timeline { position: relative; max-width: 860px; margin: 0 auto; }
.timeline::before {
  content: "";
  position: absolute;
  left: 50%; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--border-strong) 12%, var(--border-strong) 88%, transparent);
}
.tl-item { position: relative; width: 50%; padding: 0 48px 56px; }
.tl-item:nth-child(odd) { left: 0; text-align: right; }
.tl-item:nth-child(even) { left: 50%; }
.tl-dot {
  position: absolute;
  top: 6px;
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 5px var(--gold-soft), 0 0 18px rgba(0,113,227,.4);
}
.tl-item:nth-child(odd) .tl-dot { right: -6.5px; }
.tl-item:nth-child(even) .tl-dot { left: -6.5px; }
.tl-year { font-size: 13px; font-weight: 700; letter-spacing: .12em; color: var(--gold); margin-bottom: 8px; }
.timeline-photo {
  display: block;
  width: 100%;
  max-width: 980px;
  height: clamp(220px, 30vw, 400px);
  margin: 0 auto 72px;
  object-fit: cover;
  border-radius: 28px;
  border: 1px solid var(--border);
  box-shadow: 0 24px 64px rgba(0,0,0,.12);
}
.tl-card {
  display: inline-block;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 22px 26px;
  text-align: left;
  max-width: 360px;
  transition: transform .45s var(--ease), border-color .45s var(--ease);
}
.tl-card:hover { transform: translateY(-4px); border-color: rgba(0,113,227,.3); }
.tl-card h3 { margin: 0 0 6px; font-size: 1.05rem; }
.tl-card p { margin: 0; color: var(--text-2); font-size: 14.5px; }

/* ---------- 氛围展示带 ---------- */
.atmosphere {
  position: relative;
  min-height: 480px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 110px 24px;
  background-image:
    linear-gradient(180deg, rgba(0,0,0,.58), rgba(0,0,0,.34) 45%, rgba(0,0,0,.66)),
    url("../images/img-atmosphere.jpg");
  background-size: cover;
  background-position: center;
}
.atmosphere-inner { max-width: 720px; }
.atmosphere .eyebrow { justify-content: center; }
.atmosphere .eyebrow::before { display: none; }
.atmosphere-title {
  font-size: clamp(1.9rem, 4.2vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.022em;
  line-height: 1.15;
  margin: 0 0 18px;
  color: #fff;
}
.atmosphere-sub {
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  color: rgba(245, 245, 247, 0.86);
  margin: 0 auto;
  max-width: 560px;
}

/* ---------- 联系 / 预约 ---------- */
.contact-wrap { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: start; }
.contact-photo {
  margin: 0 0 22px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
}
.contact-photo img {
  width: 100%;
  height: 230px;
  object-fit: cover;
  transition: transform .6s var(--ease);
}
.contact-photo:hover img { transform: scale(1.03); }
.contact-info .c-row { display: flex; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--border); }
.contact-info .c-row:last-child { border-bottom: none; }
.c-icon {
  flex: none;
  width: 46px; height: 46px;
  display: grid; place-items: center;
  border-radius: 13px;
  background: var(--gold-soft);
  color: var(--gold);
}
.c-row h4 { margin: 0 0 4px; font-size: 15px; }
.c-row p { margin: 0; color: var(--text-2); font-size: 15px; }
.c-row .hint { font-size: 12.5px; color: var(--text-3); margin-top: 3px; }

.form-card {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  padding: 36px;
}
.form-card h3 { margin: 0 0 6px; font-size: 1.4rem; letter-spacing: -0.02em; }
.form-card .form-sub { margin: 0 0 28px; color: var(--text-2); font-size: 14.5px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 13.5px; font-weight: 600; color: var(--text-2); }
.field label em { font-style: normal; color: var(--gold); }
.field input, .field select {
  width: 100%;
  padding: 13px 16px;
  border-radius: 13px;
  border: 1px solid var(--border-strong);
  background: rgba(0,0,0,.035);
  color: var(--text);
  font: inherit;
  font-size: 15px;
  transition: border-color .3s, box-shadow .3s, background .3s;
  appearance: none;
}
.field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23a7a7ad' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
}
.field select option { background: var(--surface-2); color: var(--text); }
.field input::placeholder { color: var(--text-3); }
.field input:focus, .field select:focus {
  outline: none;
  border-color: var(--gold);
  background: rgba(0,0,0,.05);
  box-shadow: 0 0 0 4px var(--gold-soft);
}
.field .err { display: none; font-size: 12.5px; color: #ff6b5e; }
.field.invalid input, .field.invalid select { border-color: rgba(255,107,94,.7); }
.field.invalid .err { display: block; }
.form-actions { margin-top: 24px; display: flex; flex-direction: column; gap: 14px; }
.form-actions .btn { width: 100%; }
.form-legal { font-size: 12.5px; color: var(--text-3); text-align: center; margin: 0; }

.form-success {
  display: none;
  text-align: center;
  padding: 40px 10px;
}
.form-success .ok {
  width: 72px; height: 72px;
  margin: 0 auto 22px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: var(--gold-soft);
  color: var(--gold);
  animation: popIn .6s var(--ease);
}
@keyframes popIn { from { transform: scale(.5); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.form-success h4 { margin: 0 0 8px; font-size: 1.35rem; }
.form-success p { margin: 0 0 24px; color: var(--text-2); font-size: 15px; }

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 64px 0 40px;
  font-size: 14px;
}
.footer-top { display: grid; grid-template-columns: 1.4fr repeat(2, 1fr); gap: 48px; margin-bottom: 56px; }
.footer h5 { font-size: 13px; letter-spacing: .1em; text-transform: uppercase; color: var(--text-3); margin: 0 0 18px; }
.footer-desc { color: var(--text-2); max-width: 300px; margin: 16px 0 0; font-size: 14px; }
.footer-links li { margin-bottom: 12px; }
.footer-links a { color: var(--text-2); transition: color .3s; }
.footer-links a:hover { color: var(--gold-bright); }
.footer-bottom {
  display: flex; flex-wrap: wrap; gap: 12px 24px;
  justify-content: space-between; align-items: center;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  color: var(--text-3);
  font-size: 12.5px;
}
.footer-note {
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: 12px;
  border: 1px dashed var(--border-strong);
  background: rgba(0,0,0,.03);
  color: var(--text-3);
  font-size: 12.5px;
}

/* ---------- 品牌页 Hero ---------- */
.b-hero {
  position: relative;
  padding: calc(var(--nav-h) + 90px) 0 110px;
  overflow: hidden;
}
.b-hero::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 70% 55% at 50% 0%, var(--accent-soft), transparent 65%),
    linear-gradient(180deg, rgba(255,255,255,.88) 0%, rgba(255,255,255,.42) 55%, var(--bg) 96%);
}
.b-hero .hero-bg { opacity: .5; }
.b-hero .container { position: relative; z-index: 2; }
.b-hero-head { max-width: 760px; }
.b-hero h1 { margin: 0 0 14px; font-size: clamp(2.7rem, 7vw, 4.6rem); font-weight: 700; letter-spacing: -0.03em; line-height: 1.05; }
.b-hero .b-en { font-size: 13px; letter-spacing: .24em; text-transform: uppercase; color: var(--accent); font-weight: 700; margin-bottom: 18px; display: block; }
.b-hero p { font-size: clamp(1.02rem, 1.9vw, 1.25rem); color: var(--text-2); max-width: 620px; margin: 0 0 36px; }
.b-hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }
.b-hero-meta {
  display: flex; flex-wrap: wrap; gap: 14px 28px;
  margin-top: 52px;
  padding-top: 30px;
  border-top: 1px solid var(--border);
  max-width: 640px;
}
.b-hero-meta .m-item { display: flex; align-items: center; gap: 12px; }
.m-ico {
  flex: none;
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
}
.m-ico svg { width: 20px; height: 20px; }
.m-txt { display: flex; flex-direction: column; gap: 2px; }
.b-hero-meta b { font-size: 18px; }
.b-hero-meta span { font-size: 12.5px; color: var(--text-3); letter-spacing: .06em; }

/* ---------- 品牌产品网格 ---------- */
.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.prod-grid--2 { grid-template-columns: repeat(2, 1fr); }
.prod-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  overflow: hidden;
  transition: transform .5s var(--ease), border-color .5s var(--ease), box-shadow .5s var(--ease);
}
.prod-card:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: 0 24px 56px rgba(0,0,0,.45); }
.prod-media {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: linear-gradient(160deg, #f5f5f7, #eaeaea);
}
.prod-media img { width: 100%; height: 100%; object-fit: contain; transition: transform 1s var(--ease); }
.prod-card:hover .prod-media img { transform: scale(1.05); }
.prod-badge {
  position: absolute; top: 16px; left: 16px;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px;
  border-radius: 980px;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .06em;
}
.prod-badge svg { width: 12px; height: 12px; }
.prod-body { display: flex; flex-direction: column; flex: 1; padding: 26px 26px 28px; }
.prod-body h3 { margin: 0 0 6px; font-size: 1.3rem; letter-spacing: -0.02em; }
.prod-cn { font-size: 12.5px; color: var(--text-3); letter-spacing: .06em; margin-bottom: 14px; }
.prod-specs { display: grid; gap: 9px; margin: 0 0 22px; }
.prod-specs li {
  display: flex; justify-content: space-between; gap: 16px;
  font-size: 13.5px;
  padding-bottom: 9px;
  border-bottom: 1px dashed var(--border);
}
.prod-specs li:last-child { border-bottom: none; }
.prod-specs dt { color: var(--text-3); flex: none; }
.prod-specs dd { margin: 0; text-align: right; color: var(--text-2); }
.prod-foot { margin-top: auto; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.prod-price { font-size: 15px; font-weight: 700; color: var(--accent); }
.prod-price small { display: block; font-size: 11.5px; font-weight: 400; color: var(--text-3); }
.prod-link {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 13.5px; font-weight: 600;
  color: var(--text-2);
  padding: 9px 16px;
  border-radius: 980px;
  border: 1px solid var(--border-strong);
  transition: all .35s var(--ease);
}
.prod-link:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }
.prod-link svg { width: 13px; height: 13px; }

.note-callout {
  margin-top: 40px;
  display: flex; align-items: flex-start; gap: 14px;
  padding: 18px 22px;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--border-strong);
  background: rgba(0,0,0,.03);
  color: var(--text-2);
  font-size: 14px;
}
.note-callout svg { flex: none; color: var(--gold); margin-top: 2px; }

/* ---------- 品牌服务 ---------- */
.brand-service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.bs-card {
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 30px 26px;
  text-align: center;
  transition: transform .45s var(--ease), border-color .45s var(--ease);
}
.bs-card:hover { transform: translateY(-5px); border-color: color-mix(in srgb, var(--accent) 40%, transparent); }
.bs-icon {
  width: 56px; height: 56px;
  margin: 0 auto 18px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: var(--accent-soft);
  color: var(--accent);
}
.bs-card h3 { margin: 0 0 8px; font-size: 1.05rem; }
.bs-card p { margin: 0; color: var(--text-2); font-size: 14px; }

/* ---------- 页面切换过渡 ---------- */
.page-fade { animation: pageFade .6s var(--ease); }
@keyframes pageFade { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

/* ---------- 滚动显现 ---------- */
html.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
html.js .reveal.is-visible { opacity: 1; transform: none; }
html.js .reveal[data-delay="1"] { transition-delay: .1s; }
html.js .reveal[data-delay="2"] { transition-delay: .2s; }
html.js .reveal[data-delay="3"] { transition-delay: .3s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  html.js .reveal { opacity: 1; transform: none; transition: none; }
  .hero-bg { animation: none; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .brand-grid { grid-template-columns: repeat(2, 1fr); }
  .service-grid, .brand-service-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .section { padding: 84px 0; }
  .contact-wrap { grid-template-columns: 1fr; gap: 40px; }
  .footer-top { grid-template-columns: 1fr; gap: 36px; }

  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 18px 24px 30px;
    background: rgba(255, 255, 255, 0.96);
    -webkit-backdrop-filter: saturate(180%) blur(24px);
    backdrop-filter: saturate(180%) blur(24px);
    border-bottom: 1px solid var(--border);
    transform: translateY(-16px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .35s var(--ease), transform .35s var(--ease);
  }
  body.nav-open .nav-links { opacity: 1; transform: none; pointer-events: auto; }
  .nav-links a { padding: 14px 18px; font-size: 16px; border-radius: 12px; }
  .nav-links .nav-cta { text-align: center; margin-top: 6px; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .container { width: calc(100% - 40px); }
  .section { padding: 72px 0; }
  .section-head { margin-bottom: 44px; }
  .hero { min-height: 92svh; padding-top: calc(var(--nav-h) + 40px); }
  .hero-stats { gap: 28px; margin-top: 52px; }
  .brand-grid, .service-grid, .brand-service-grid, .prod-grid { grid-template-columns: 1fr; }
  .brand-card { min-height: 400px; }
  .form-grid { grid-template-columns: 1fr; }
  .form-card { padding: 26px 22px; }
  .timeline::before { left: 7px; }
  .tl-item, .tl-item:nth-child(odd), .tl-item:nth-child(even) { width: 100%; left: 0; text-align: left; padding: 0 0 40px 34px; }
  .tl-item:nth-child(odd) .tl-dot, .tl-item:nth-child(even) .tl-dot { left: 1.5px; right: auto; }
  .tl-item:nth-child(odd) .tl-card { text-align: left; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}