/* ============================================================
   深圳市双雄光电电子有限公司 · SMT 贴片加工 官网样式 v3
   设计语言：黑白蓝格调 —— 深蓝黑近黑背景 + 宝蓝/天蓝强调 + 灰白卡片
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  --dark: #0A101C;        /* 深蓝黑 · hero / 产能 / 联系 / 页脚 */
  --dark-deep: #05080E;
  --primary: #2563EB;     /* 宝蓝 · 主色 */
  --primary-deep: #1D4ED8;
  --primary-soft: #60A5FA;
  --sky: #38BDF8;         /* 天蓝 · 点缀 */
  --sky-bright: #7DD3FC;
  --sky-soft: #E0F2FE;
  --paper: #F4F6FA;
  --white: #FFFFFF;
  --ink: #101826;
  --muted: #5A6472;
  --line: #E3E8F0;
  --line-dark: rgba(255,255,255,.14);

  --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC",
             -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --radius: 10px;
  --shadow: 0 1px 2px rgba(10,16,28,.06), 0 8px 24px rgba(10,16,28,.08);
  --shadow-lift: 0 2px 4px rgba(10,16,28,.08), 0 18px 44px rgba(37,99,235,.16);
  --maxw: 1120px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; line-height: 1.3; font-weight: 700; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.mono { font-family: var(--font-mono); letter-spacing: .02em; }

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

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  cursor: pointer;
  transition: transform .15s ease, background-color .15s ease,
              border-color .15s ease, box-shadow .15s ease, filter .15s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-blue {
  background: linear-gradient(135deg, var(--primary-soft), var(--primary-deep));
  color: #fff;
  box-shadow: 0 4px 14px rgba(37,99,235,.35);
}
.btn-blue:hover {
  filter: brightness(1.08);
  box-shadow: 0 8px 24px rgba(37,99,235,.5);
}

.btn-ghost {
  background: rgba(255,255,255,.04);
  border-color: rgba(255,255,255,.4);
  color: #fff;
  backdrop-filter: blur(4px);
}
.btn-ghost:hover { border-color: var(--sky-bright); color: var(--sky-bright); background: rgba(255,255,255,.08); }

.btn-sm { padding: 7px 14px; font-size: 14px; }
.btn-lg { padding: 14px 26px; font-size: 16px; }
.btn-xs { padding: 4px 10px; font-size: 12px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: transparent;
  transition: background-color .25s ease, box-shadow .25s ease;
}
.site-header.scrolled {
  background: rgba(5,8,14,.92);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 var(--line-dark);
}

.nav-wrap {
  display: flex;
  align-items: center;
  gap: 26px;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
}
.brand img {
  height: 46px;
  width: auto;
  background: #fff;
  border-radius: 10px;
  padding: 5px 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,.4), 0 0 20px rgba(255,255,255,.12);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 17px; letter-spacing: .02em; }
.brand-text small {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--sky-bright);
  letter-spacing: .14em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  gap: 2px;
  margin-left: auto;
}
.site-nav a {
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14.5px;
  color: rgba(255,255,255,.82);
  transition: color .15s ease, background-color .15s ease;
}
.site-nav a:hover { color: var(--sky-bright); background: rgba(255,255,255,.07); }

.nav-cta { display: flex; align-items: center; gap: 10px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 0;
  background: transparent;
  border: 1px solid rgba(255,255,255,.3);
  border-radius: 8px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 0 auto;
  background: #fff;
  border-radius: 1px;
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  color: #fff;
  background:
    radial-gradient(760px 460px at 10% 0%, rgba(37,99,235,.45), transparent 70%),
    radial-gradient(680px 520px at 96% 100%, rgba(56,189,248,.16), transparent 70%),
    radial-gradient(420px 300px at 85% 8%, rgba(125,211,252,.12), transparent 70%),
    repeating-linear-gradient(0deg, transparent 0 38px, rgba(255,255,255,.03) 38px 39px),
    repeating-linear-gradient(90deg, transparent 0 38px, rgba(255,255,255,.03) 38px 39px),
    var(--dark);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 48px;
  align-items: center;
  padding-top: 72px;
  padding-bottom: 56px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 18px;
}
.hero .eyebrow { color: var(--sky); }

.hero h1 {
  font-size: clamp(1.9rem, 4.4vw, 3.1rem);
  font-weight: 800;
  letter-spacing: .01em;
  margin-bottom: 20px;
}
.hero-accent {
  color: var(--sky-bright);
  text-shadow: 0 0 24px rgba(125,211,252,.45);
}

.hero-sub {
  font-size: 17px;
  color: rgba(255,255,255,.82);
  margin-bottom: 30px;
}
.hero-sub strong { color: var(--sky-bright); }

.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-hint {
  margin-top: 18px;
  font-size: 13.5px;
  color: rgba(255,255,255,.55);
}
.hero-hint .mono { color: var(--sky-bright); }

/* 板卡插图 */
.hero-board { position: relative; }
.hero-board .pcb { width: 100%; height: auto; }

/* 元件贴装动画：元件从上方落下 */
.chip { opacity: 0; }
.chip-2 { opacity: 0; }
.chip-3 { opacity: 0; }
.chip-4 { opacity: 0; }
.chip-5 { opacity: 0; }
.head { opacity: 0; }

@keyframes place {
  0%   { translate: 0 -44px; opacity: 0; }
  60%  { translate: 0 4px;  opacity: 1; }
  80%  { translate: 0 -3px;  opacity: 1; }
  100% { translate: 0 0;    opacity: 1; }
}
@keyframes head-in {
  0%   { translate: 0 -30px; opacity: 0; }
  100% { translate: 0 0;    opacity: 1; }
}
.chip  { animation: place .65s cubic-bezier(.2,.7,.3,1.2) .25s forwards; }
.chip-2{ animation: place .65s cubic-bezier(.2,.7,.3,1.2) .75s forwards; }
.chip-3{ animation: place .65s cubic-bezier(.2,.7,.3,1.2) 1.25s forwards; }
.chip-4{ animation: place .65s cubic-bezier(.2,.7,.3,1.2) 1.75s forwards; }
.chip-5{ animation: place .65s cubic-bezier(.2,.7,.3,1.2) 2.25s forwards; }
.head  { animation: head-in .8s ease .55s forwards; }

/* 数据条 */
.hero-stats {
  border-top: 1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.22);
}
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 22px 8px;
  border-left: 1px solid rgba(255,255,255,.1);
}
.stat:first-child { border-left: none; }
.stat-num {
  font-size: clamp(1.05rem, 2.2vw, 1.45rem);
  font-weight: 600;
  color: var(--sky-bright);
  text-shadow: 0 0 18px rgba(125,211,252,.4);
}
.stat-label { font-size: 13px; color: rgba(255,255,255,.6); }

/* ---------- 通用段落 ---------- */
.section { padding: 88px 0; position: relative; }
.section-alt {
  background: linear-gradient(180deg, var(--white), #F1F5FA);
}

.section + .section-alt,
.section-alt + .section,
.section-pain + .section,
.section-capacity + .section,
.section + .section-pain,
.section + .section-capacity { border-top: 1px solid var(--line); }

.sec-head { max-width: 680px; margin-bottom: 52px; }
.sec-head h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.2rem);
  margin-bottom: 14px;
}
.sec-head h2::after {
  content: "";
  display: block;
  width: 52px;
  height: 3px;
  margin-top: 12px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--sky));
}
.sec-sub { color: var(--muted); font-size: 16px; }

/* ---------- 服务卡片 ---------- */
.grid.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
  border-color: var(--primary-soft);
}
.section-alt .card { background: var(--white); }

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  margin-bottom: 18px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(37,99,235,.14), rgba(56,189,248,.1));
  color: var(--primary-deep);
}
.card-icon svg { width: 24px; height: 24px; }

.card h3 { font-size: 18px; margin-bottom: 8px; }
.card p { font-size: 14.5px; color: var(--muted); }

/* ---------- 痛点开篇 ---------- */
.section-pain {
  background:
    radial-gradient(760px 460px at 8% 0%, rgba(37,99,235,.3), transparent 70%),
    radial-gradient(520px 380px at 94% 100%, rgba(56,189,248,.08), transparent 70%),
    var(--dark-deep);
  color: #fff;
}
.section-pain .eyebrow { color: var(--sky); }
.section-pain .sec-sub { color: rgba(255,255,255,.62); }

.pain-grid {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 40px;
  align-items: stretch;
}

.pain-list { display: flex; flex-direction: column; gap: 14px; }
.pain-item {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.12);
  border-left: 3px solid rgba(125,211,252,.55);
  border-radius: var(--radius);
  padding: 22px 24px;
  transition: transform .18s ease, border-color .18s ease, background-color .18s ease;
}
.pain-item:hover {
  transform: translateY(-3px);
  border-color: rgba(125,211,252,.6);
  background: rgba(255,255,255,.06);
}
.pain-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .18em;
  color: var(--sky-bright);
  margin-bottom: 8px;
}
.pain-item h3 { color: #fff; font-size: 17px; margin-bottom: 6px; }
.pain-item p { color: rgba(255,255,255,.68); font-size: 14px; }

.pain-solution {
  position: relative;
  background: var(--white);
  border-radius: var(--radius);
  border-top: 4px solid var(--primary);
  padding: 32px 30px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-shadow: var(--shadow-lift);
}
.pain-solution .callout-tag { color: var(--primary-deep); margin-bottom: 8px; }
.pain-solution h3 { font-size: 22px; margin-bottom: 10px; color: var(--ink); }
.pain-solution p { font-size: 14.5px; color: var(--muted); }
.pain-solution p strong { color: var(--primary-deep); }
.pain-solution .btn { margin-top: 22px; align-self: flex-start; }

/* ---------- 核心卖点 ---------- */
.adv-grid { grid-template-columns: repeat(2, 1fr); }

.adv-card { position: relative; overflow: hidden; }
.adv-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--sky) 55%, var(--primary-soft));
  opacity: 0;
  transition: opacity .18s ease;
}
.adv-card:hover::before { opacity: 1; }

.adv-num {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: .14em;
  margin-bottom: 12px;
}

.adv-card h3 { font-size: 19px; margin-bottom: 10px; }
.adv-card p { font-size: 14.5px; }

.callout-card {
  background: linear-gradient(135deg, #3B82F6, #1E3A8A);
  border: none;
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.callout-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(37,99,235,.45);
  border-color: transparent;
}
.callout-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--sky-bright);
  margin-bottom: 10px;
}
.callout-card h3 { font-size: 22px; margin-bottom: 8px; }
.callout-card p { color: rgba(255,255,255,.85); }

/* ---------- 可贴元器件能力 ---------- */
.equip-wrap {
  display: grid;
  grid-template-columns: 1.35fr .65fr;
  gap: 40px;
  align-items: stretch;
}

.cap-bom {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
  box-shadow: var(--shadow);
}
.section-alt .cap-bom { background: var(--white); }

.cap-bom .bom-row {
  display: grid;
  grid-template-columns: 92px 1.5fr 1.2fr;
  gap: 12px;
  align-items: center;
  padding: 15px 18px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}
.cap-bom .bom-row:first-child { border-top: none; }
.cap-bom .bom-head {
  background: linear-gradient(135deg, #0B1220, var(--primary-deep));
  color: #fff;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  padding: 11px 18px;
}
.cap-bom .bom-row:hover { background: rgba(37,99,235,.05); }
.bom-key {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}
.cap-bom .bom-row span:nth-child(2) { color: var(--muted); }
.cap-bom .bom-row span:nth-child(3) { color: var(--primary-deep); font-size: 13px; }

.equip-side {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.cap-note {
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius);
  padding: 30px 26px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.cap-note h3 { font-size: 19px; margin-bottom: 10px; }
.cap-note h3::before { content: "产线特点"; display: none; }
.cap-note p { font-size: 14.5px; color: var(--muted); }

/* 设备实拍照片墙 */
.equip-photos {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.equip-photo {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
  transition: transform .18s ease, box-shadow .18s ease;
}
.equip-photo:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); }
.equip-photo img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  display: block;
}
.equip-photo-main { grid-column: 1 / -1; }
.equip-photo-main img { aspect-ratio: 16 / 9; }
.equip-photo figcaption {
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  border-top: 1px solid var(--line);
}

/* ---------- 产线产能 ---------- */
.section-capacity {
  background:
    radial-gradient(760px 460px at 92% 8%, rgba(37,99,235,.4), transparent 70%),
    radial-gradient(520px 380px at 4% 96%, rgba(56,189,248,.12), transparent 70%),
    repeating-linear-gradient(0deg, transparent 0 38px, rgba(255,255,255,.025) 38px 39px),
    repeating-linear-gradient(90deg, transparent 0 38px, rgba(255,255,255,.025) 38px 39px),
    var(--dark);
  color: #fff;
}
.section-capacity .eyebrow { color: var(--sky); }
.section-capacity .sec-sub { color: rgba(255,255,255,.62); }

.cap-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.cap-card {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--radius);
  padding: 32px 30px;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.cap-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 44px rgba(0,0,0,.35);
  border-color: rgba(125,211,252,.45);
}
.cap-card-accent {
  background: linear-gradient(160deg, rgba(37,99,235,.32), rgba(30,58,138,.42));
  border-color: rgba(96,165,250,.4);
}
.cap-mode {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--sky-bright);
  margin-bottom: 12px;
}
.cap-card h3 { font-size: 20px; margin-bottom: 10px; color: #fff; }
.cap-desc { color: rgba(255,255,255,.78); font-size: 14.5px; }

.cap-points { margin-top: 18px; }
.cap-points li {
  position: relative;
  padding: 8px 0 8px 28px;
  border-top: 1px solid rgba(255,255,255,.09);
  color: rgba(255,255,255,.88);
  font-size: 14px;
}
.cap-points li::before {
  content: "✓";
  position: absolute;
  left: 2px;
  color: var(--sky);
  font-weight: 700;
}

.cap-note-capacity {
  margin-top: 24px;
  text-align: center;
  color: rgba(255,255,255,.55);
  font-size: 13.5px;
}

/* ---------- 打样流程 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 24px 20px 20px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform .18s ease, box-shadow .18s ease;
}
.step:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); }
.step::before {
  content: "";
  position: absolute;
  top: -1px; left: -1px; right: -1px;
  height: 3px;
  border-radius: 3px 3px 0 0;
  background: linear-gradient(90deg, var(--primary), var(--sky));
}
.step-num {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: .12em;
  margin-bottom: 10px;
}
.step h3 { font-size: 16.5px; margin-bottom: 6px; }
.step p { font-size: 13.5px; color: var(--muted); }

/* ---------- 案例 ---------- */
.case-cards { margin-top: 8px; }
.case-card { padding: 0; overflow: hidden; }
.case-card img {
  width: 100%;
  aspect-ratio: 300/200;
  object-fit: cover;
  border-bottom: 1px solid var(--line);
}
.case-body { padding: 20px 24px 24px; }
.case-body h3 { font-size: 17px; margin-bottom: 6px; }
.case-specs {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--primary-deep);
  margin-bottom: 10px;
  letter-spacing: .04em;
}
.case-body p:last-child { font-size: 14px; color: var(--muted); }

/* ---------- 车间实景 ---------- */
.workshop-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}
.ws-item {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
  transition: transform .18s ease, box-shadow .18s ease;
}
.ws-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); }
.ws-item img {
  width: 100%;
  aspect-ratio: 400/280;
  object-fit: cover;
}
.ws-item figcaption {
  padding: 12px 18px;
  font-size: 14px;
  color: var(--ink);
  border-top: 1px solid var(--line);
}

/* ---------- 联系（深色段） ---------- */
.section-contact {
  background:
    radial-gradient(640px 420px at 90% 10%, rgba(37,99,235,.5), transparent 70%),
    radial-gradient(480px 340px at 8% 90%, rgba(56,189,248,.14), transparent 70%),
    var(--dark);
  color: #fff;
}
.section-contact .eyebrow { color: var(--sky); }
.section-contact .sec-sub { color: rgba(255,255,255,.7); }

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 48px;
  align-items: start;
}

.contact-list { margin-top: 8px; }
.contact-list li {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-dark);
}
.contact-list li:first-child { border-top: 1px solid var(--line-dark); }
.contact-tag {
  flex: none;
  width: 48px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--sky);
}
.contact-val { font-size: 17px; }
.contact-list a.contact-val:hover { color: var(--sky-bright); }
.contact-list .btn-xs { margin-left: 4px; }

.contact-qr {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  box-shadow: var(--shadow);
}
.contact-qr img {
  width: 190px;
  height: 190px;
  margin: 0 auto 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
}
.contact-qr p { font-size: 13.5px; color: var(--muted); }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--dark-deep);
  color: rgba(255,255,255,.6);
  font-size: 13.5px;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 24px;
  justify-content: space-between;
  padding-top: 26px;
  padding-bottom: 26px;
}
.site-footer a:hover { color: var(--sky-bright); }
.footer-meta { font-size: 12.5px; color: rgba(255,255,255,.42); }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 34px;
  transform: translate(-50%, 20px);
  z-index: 99;
  padding: 11px 22px;
  border-radius: 8px;
  background: var(--dark-deep);
  color: #fff;
  font-size: 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease, transform .25s ease;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 滚动浮现 ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; padding-top: 48px; }
  .hero-board { max-width: 460px; margin: 0 auto; }

  .grid.cards { grid-template-columns: 1fr 1fr; }
  .adv-grid { grid-template-columns: 1fr 1fr; }
  .pain-grid { grid-template-columns: 1fr; }
  .equip-wrap { grid-template-columns: 1fr; }
  .cap-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .step:last-child { grid-column: 1 / -1; }

  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .site-nav {
    position: fixed;
    inset: 68px 0 auto 0;
    flex-direction: column;
    gap: 2px;
    padding: 14px 24px 22px;
    background: rgba(5,8,14,.97);
    backdrop-filter: blur(10px);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s ease, transform .2s ease;
  }
  .site-nav.open { opacity: 1; transform: none; pointer-events: auto; }
  .site-nav a { padding: 12px 10px; font-size: 16px; border-bottom: 1px solid var(--line-dark); }

  .nav-toggle { display: flex; }
  .nav-cta .btn { display: none; }
}

@media (max-width: 720px) {
  .section { padding: 64px 0; }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .stat { border-top: 1px solid rgba(255,255,255,.1); }
  .stat:nth-child(1), .stat:nth-child(2) { border-top: none; }
  .stat:nth-child(3) { border-left: none; }

  .cap-bom .bom-row { grid-template-columns: 88px 1fr; }
  .cap-bom .bom-row span:nth-child(3) { display: none; }

  .steps { grid-template-columns: 1fr; }
  .step:last-child { grid-column: auto; }

  .workshop-grid { grid-template-columns: 1fr; }
  .contact-list li { gap: 12px; }
}

@media (max-width: 520px) {
  .grid.cards, .adv-grid { grid-template-columns: 1fr; }
  .hero-cta .btn { width: 100%; }
  .cap-card { padding: 26px 22px; }
}

/* ---------- 动画偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .chip, .chip-2, .chip-3, .chip-4, .chip-5, .head {
    animation: none;
    opacity: 1;
    translate: 0 0;
  }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { transition-duration: .01ms !important; }
}