/* 长滩拓海 · 落地页样式 v9
   方向:浅灰底 + 衬线大字 + 黑色胶囊导航 + 薰衣草紫点缀(参考 serus.ai) */
:root {
  --bg: #e9e9e9;             /* 浅灰页面底 */
  --surface: #f4f4f4;        /* 浅面 */
  --card: #ffffff;           /* 卡片 */
  --ink: #0d0d0d;            /* 近黑 */
  --ink-2: #1c1c1e;
  --dim: #5b5b5b;            /* 次级文字 */
  --dim-2: #8a8a8a;
  --line: rgba(13, 13, 13, 0.1);
  --line-2: rgba(13, 13, 13, 0.22);
  --accent: #a290e5;         /* 薰衣草紫 */
  --accent-deep: #7c6bc9;
  --grad: linear-gradient(100deg, #8f7bd8, #a290e5);
  --radius: 20px;
  --sans: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  --serif: "Noto Serif SC", Georgia, "Times New Roman", "Source Han Serif SC", "Songti SC", "STSong", serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
[id] { scroll-margin-top: 110px; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  font-size: 15.5px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.22; letter-spacing: 0.005em; }
::selection { background: rgba(162, 144, 229, 0.4); }
img, svg { display: block; }

/* ---------- 导航:悬浮黑色胶囊 ---------- */
.nav { position: sticky; top: 14px; z-index: 50; padding: 0 16px; }
.nav-inner {
  max-width: 1080px; margin: 0 auto; height: 60px;
  display: flex; align-items: center; justify-content: space-between;
  background: var(--ink); color: #fff;
  border-radius: 999px; padding: 0 10px 0 24px;
  box-shadow: 0 10px 34px rgba(13, 13, 13, 0.22);
}
.logo { display: inline-flex; align-items: center; gap: 9px; }
.logo-mark { width: 20px; height: 20px; }
.logo-text { font-family: var(--serif); font-size: 18px; font-weight: 600; letter-spacing: 0.01em; color: #fff; }
.nav-links { display: flex; align-items: center; gap: 30px; font-size: 14px; color: rgba(255, 255, 255, 0.72); }
.nav-links a { transition: color 0.2s; }
.nav-links a:hover { color: #fff; }
.nav-cta {
  color: var(--ink) !important; background: var(--accent);
  border-radius: 999px; padding: 9px 22px; font-size: 13.5px; font-weight: 600;
  transition: background 0.2s, transform 0.2s;
}
.nav-cta:hover { background: #b3a5ec; transform: translateY(-1px); }

.nav-toggle {
  display: none; width: 40px; height: 40px; border: none;
  background: rgba(255, 255, 255, 0.1); border-radius: 50%; cursor: pointer;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav-toggle span { width: 16px; height: 1.5px; background: #fff; transition: transform 0.25s; }
.nav-toggle.open span:first-child { transform: translateY(3.25px) rotate(45deg); }
.nav-toggle.open span:last-child { transform: translateY(-3.25px) rotate(-45deg); }

/* ---------- 按钮与链接 ---------- */
.btn {
  display: inline-block; padding: 15px 36px; border-radius: 999px;
  font-size: 15px; font-weight: 600; cursor: pointer; border: none;
  font-family: var(--sans); letter-spacing: 0.01em; text-align: center;
  transition: transform 0.2s, box-shadow 0.25s, background 0.2s, color 0.2s, border-color 0.2s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(13, 13, 13, 0.25); }
.btn-ghost {
  background: transparent; color: var(--ink); font-size: 14px;
  border: 1px solid var(--line-2); padding: 12px 26px;
}
.btn-ghost:hover { border-color: var(--ink); background: rgba(13, 13, 13, 0.04); }
.btn-block { width: 100%; }
.arrow-link {
  font-size: 14.5px; font-weight: 500; color: var(--ink);
  display: inline-flex; align-items: center; gap: 8px;
  border-bottom: 1px solid var(--line-2); padding-bottom: 3px;
  transition: color 0.2s, border-color 0.2s, gap 0.2s;
}
.arrow-link:hover { color: var(--accent-deep); border-color: var(--accent-deep); gap: 13px; }
.arrow-link::after { content: "→"; }

/* ---------- Hero ---------- */
.hero { padding: 96px 0 80px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }
.eyebrow {
  font-size: 11.5px; letter-spacing: 0.3em; color: var(--dim);
  text-transform: uppercase; margin-bottom: 28px; display: flex; align-items: center; gap: 14px;
}
.eyebrow::before { content: ""; width: 30px; height: 1px; background: var(--accent-deep); }
.eyebrow-center { justify-content: center; }
.hero-title { font-size: clamp(38px, 5.4vw, 66px); font-weight: 600; margin-bottom: 28px; }
.hero-title em {
  font-style: italic; font-weight: 500; color: var(--accent-deep);
  padding-right: 0.06em;
}
.hero-sub { color: var(--dim); font-size: 16px; max-width: 520px; margin-bottom: 40px; }
.hero-actions { display: flex; gap: 26px; align-items: center; flex-wrap: wrap; margin-bottom: 48px; }
.hero-meta { list-style: none; display: flex; gap: 12px 30px; flex-wrap: wrap; }
.hero-meta li { font-size: 13px; color: var(--dim); padding-left: 16px; position: relative; }
.hero-meta li::before {
  content: ""; position: absolute; left: 0; top: 0.62em;
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent);
}

/* Hero 右侧深色视觉块(serus 式深浅对比) */
.hero-visual {
  position: relative; border-radius: 28px; overflow: hidden;
  background: var(--ink); min-height: 480px;
  box-shadow: 0 30px 70px rgba(13, 13, 13, 0.3);
}
.hero-visual::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(420px 300px at 82% 12%, rgba(162, 144, 229, 0.32), transparent 65%),
    radial-gradient(360px 300px at 8% 92%, rgba(124, 107, 201, 0.22), transparent 65%);
}
.hv-dash {
  position: absolute; left: 8%; right: 8%; top: 50%; transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 18px; padding: 24px 24px 20px;
  backdrop-filter: blur(6px);
}
.hv-dash-head { display: flex; align-items: center; gap: 7px; margin-bottom: 18px; }
.hv-dot { width: 8px; height: 8px; border-radius: 50%; background: rgba(255, 255, 255, 0.28); }
.hv-dash-title { margin-left: 8px; font-size: 11px; letter-spacing: 0.18em; color: rgba(255, 255, 255, 0.55); text-transform: uppercase; }
.hv-chart { width: 100%; height: auto; }
.hv-kpis { display: flex; gap: 10px; margin-top: 18px; }
.hv-kpi {
  flex: 1; border: 1px solid rgba(255, 255, 255, 0.12); border-radius: 12px;
  padding: 10px 12px; background: rgba(255, 255, 255, 0.04);
}
.hv-kpi b { display: block; font-size: 16px; color: #fff; font-weight: 600; }
.hv-kpi span { font-size: 10.5px; color: rgba(255, 255, 255, 0.55); letter-spacing: 0.06em; }
.hv-tag {
  position: absolute; right: 7%; top: 9%;
  font-size: 11px; letter-spacing: 0.16em; color: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.25); border-radius: 999px; padding: 6px 14px;
  background: rgba(255, 255, 255, 0.06); backdrop-filter: blur(4px);
}

/* ---------- 品类滚动条 ---------- */
.marquee {
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  padding: 22px 0; overflow: hidden;
}
.marquee-track { display: flex; width: max-content; animation: marquee 30s linear infinite; }
.marquee-group {
  display: flex; align-items: center; gap: 38px; padding-right: 38px;
  font-family: var(--serif); font-size: 15.5px; letter-spacing: 0.12em; color: var(--dim); white-space: nowrap;
}
.marquee-group i { font-style: normal; font-size: 10px; color: var(--accent-deep); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- Section 通用 ---------- */
.section { padding: 100px 0; border-bottom: 1px solid var(--line); }
.section-head { max-width: 640px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section h2 { font-size: clamp(28px, 3.4vw, 42px); margin-bottom: 16px; }
.section-sub { color: var(--dim); font-size: 15.5px; }

/* ---------- 商业难题 ---------- */
.prob-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.prob {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 42px 38px; display: flex; flex-direction: column;
  transition: transform 0.25s, box-shadow 0.25s;
}
.prob:hover { transform: translateY(-4px); box-shadow: 0 22px 50px rgba(13, 13, 13, 0.12); }
.prob-icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  margin-bottom: 28px; color: var(--accent-deep);
  background: rgba(162, 144, 229, 0.16); border: 1px solid rgba(124, 107, 201, 0.3);
}
.prob-icon svg { width: 24px; height: 24px; }
.prob h3 { font-size: 21px; margin-bottom: 12px; }
.prob-lead { font-size: 15.5px; font-weight: 600; margin-bottom: 10px; font-family: var(--sans); }
.prob-desc { font-size: 14px; color: var(--dim); flex: 1; }
.prob-tags-label {
  margin-top: 26px; font-size: 11px; letter-spacing: 0.22em; color: var(--dim-2);
  text-transform: uppercase; padding-top: 20px; border-top: 1px solid var(--line);
}
.prob-tags { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.prob-tags li {
  font-size: 12.5px; color: var(--dim); border: 1px solid var(--line-2);
  border-radius: 999px; padding: 5px 14px;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.prob:hover .prob-tags li { color: var(--ink); border-color: rgba(124, 107, 201, 0.45); background: rgba(162, 144, 229, 0.1); }

/* ---------- 服务能力:编号行 ---------- */
.svc-list { border-top: 1px solid var(--line); }
.svc-row {
  position: relative; display: grid; grid-template-columns: 90px 1fr 60px; align-items: center; gap: 24px;
  padding: 38px 12px; border-bottom: 1px solid var(--line);
  transition: background 0.3s, border-color 0.3s;
}
.svc-row > * { position: relative; z-index: 1; }
/* 光标聚光灯(位置由 JS 写入 --mx/--my) */
.svc-row::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: radial-gradient(300px circle at var(--mx, 30%) var(--my, 50%), rgba(162, 144, 229, 0.18), transparent 65%);
  opacity: 0; transition: opacity 0.35s;
}
.svc-row:hover { background: rgba(255, 255, 255, 0.55); border-bottom-color: var(--line-2); }
.svc-row:hover::before { opacity: 1; }
.svc-num {
  font-family: var(--serif); font-style: italic; font-size: 15px; color: var(--dim-2);
  letter-spacing: 0.1em; transition: color 0.25s;
}
.svc-row:hover .svc-num { color: var(--accent-deep); }
.svc-body h3 { font-size: clamp(20px, 2.4vw, 27px); margin-bottom: 8px; transition: color 0.2s, transform 0.3s; }
.svc-row:hover .svc-body h3 { color: var(--accent-deep); transform: translateX(6px); }
.svc-body p { font-size: 14.5px; color: var(--dim); max-width: 560px; }
.svc-arrow {
  justify-self: end; font-size: 20px; color: var(--dim-2);
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1), color 0.2s;
}
.svc-row:hover .svc-arrow { transform: translate(5px, -5px); color: var(--accent-deep); }

/* 服务行跟随悬浮预览卡(由 JS 注入,仅桌面精确指针) */
.svc-preview { position: fixed; top: 0; left: 0; z-index: 70; pointer-events: none; will-change: transform; }
.svc-preview-inner {
  width: 250px; height: 160px; border-radius: 16px; overflow: hidden; position: relative;
  border: 1px solid rgba(13, 13, 13, 0.2); box-shadow: 0 24px 60px rgba(13, 13, 13, 0.35);
  opacity: 0; transform: scale(0.92); transform-origin: 0 100%;
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.svc-preview.show .svc-preview-inner { opacity: 1; transform: scale(1); }
.svc-preview-bg { position: absolute; inset: 0; }
.svc-preview-bg::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(190px circle at 80% 16%, rgba(255, 255, 255, 0.28), transparent 60%);
}
.svc-preview.t1 .svc-preview-bg { background: linear-gradient(135deg, #17131f, #4a3d8a 62%, #a290e5); }
.svc-preview.t2 .svc-preview-bg { background: linear-gradient(135deg, #101d26, #2b6b8a 62%, #6ec6e8); }
.svc-preview.t3 .svc-preview-bg { background: linear-gradient(135deg, #1c1533, #5b4bb8 62%, #8b7bff); }
.svc-preview.t4 .svc-preview-bg { background: linear-gradient(135deg, #12241c, #2f8f5b 62%, #4ade80); }
.svc-preview.t5 .svc-preview-bg { background: linear-gradient(135deg, #2b1a12, #b8622f 62%, #ff9a5c); }
.svc-preview-label {
  position: absolute; left: 16px; right: 84px; bottom: 16px;
  font-size: 14.5px; font-weight: 600; color: #fff; line-height: 1.4;
}
.svc-preview-num {
  position: absolute; right: 14px; bottom: 6px;
  font-family: var(--serif); font-style: italic; font-size: 56px; line-height: 1;
  color: rgba(255, 255, 255, 0.85);
}
@media (hover: none), (pointer: coarse) { .svc-preview { display: none; } }

/* ---------- 合作方案 ---------- */
.plan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: stretch; }
.plan {
  position: relative; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 40px 34px; display: flex; flex-direction: column;
  transition: transform 0.25s, box-shadow 0.25s;
}
.plan:hover { transform: translateY(-4px); box-shadow: 0 22px 50px rgba(13, 13, 13, 0.12); }
.plan-tag {
  font-family: var(--serif); font-style: italic; font-size: 13px; letter-spacing: 0.14em;
  color: var(--dim-2); margin-bottom: 20px;
}
.plan h3 { font-size: 24px; margin-bottom: 10px; }
.plan-fit { font-size: 13.5px; color: var(--dim); margin-bottom: 28px; }
.plan-list { list-style: none; margin-bottom: 34px; flex: 1; }
.plan-list li {
  padding: 12px 0 12px 26px; position: relative; font-size: 14.5px;
  border-bottom: 1px solid var(--line);
}
.plan-list li:last-child { border-bottom: none; }
.plan-list li::before {
  content: "✓"; position: absolute; left: 2px; top: 12px; font-size: 12px; color: var(--accent-deep);
}
.plan-featured {
  border: 1px solid transparent;
  background:
    linear-gradient(var(--card), var(--card)) padding-box,
    var(--grad) border-box;
}
.plan-badge {
  position: absolute; top: -13px; left: 34px;
  background: var(--grad); color: #fff; font-size: 11px; font-weight: 600;
  letter-spacing: 0.12em; border-radius: 999px; padding: 5px 15px;
}

/* ---------- 合作流程 ---------- */
.steps { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 40px 34px; background: var(--surface);
  transition: transform 0.25s, box-shadow 0.25s;
}
.step:hover { transform: translateY(-4px); box-shadow: 0 22px 50px rgba(13, 13, 13, 0.1); }
.step-num {
  display: block; font-family: var(--serif); font-style: italic;
  font-size: 52px; line-height: 1; margin-bottom: 26px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.step h3 { font-size: 19px; margin-bottom: 12px; }
.step p { font-size: 14px; color: var(--dim); }

/* ---------- 客户评价 ---------- */
.section-quotes { background: var(--surface); }
.quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.quote {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 36px 32px; display: flex; flex-direction: column;
  transition: transform 0.25s, box-shadow 0.25s;
}
.quote:hover { transform: translateY(-4px); box-shadow: 0 22px 50px rgba(13, 13, 13, 0.1); }
.stars { font-size: 12px; letter-spacing: 4px; margin-bottom: 20px; color: var(--accent-deep); }
.quote blockquote { font-size: 15px; line-height: 1.95; flex: 1; }
.quote .who { margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--line); }
.who-name { font-size: 14px; font-weight: 600; }
.who-role { font-size: 12.5px; color: var(--dim-2); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 760px; margin: 0 auto; border-top: 1px solid var(--line); }
.faq { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer; list-style: none; padding: 26px 48px 26px 4px;
  font-family: var(--serif); font-size: 18px; font-weight: 600;
  position: relative; transition: color 0.2s;
}
.faq summary:hover { color: var(--accent-deep); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  font-family: var(--sans); font-size: 22px; font-weight: 300; color: var(--dim-2); transition: transform 0.25s;
}
.faq[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq p { padding: 0 48px 28px 4px; color: var(--dim); font-size: 14.5px; }

/* ---------- 投资合作:浅紫对比面板 ---------- */
.section-invest { background: transparent; }
/* 独立 /invest 页:上方无 hero,补顶部留白 */
.page-invest { padding-top: 56px; padding-bottom: 110px; }

/* ---------- 产品页 ---------- */
.page-products { padding-top: 56px; padding-bottom: 110px; }
.prod-head { max-width: 560px; margin-bottom: 48px; }
.prod-head h2 { font-size: clamp(24px, 2.6vw, 34px); }
.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.prod {
  background: #fff; border: 1px solid var(--line); border-radius: 22px;
  padding: 26px 24px; display: flex; flex-direction: column; gap: 12px;
  transition: transform 0.25s, box-shadow 0.25s;
}
.prod:hover { transform: translateY(-4px); box-shadow: 0 20px 50px rgba(13, 13, 13, 0.08); }
.prod-top { display: flex; align-items: center; justify-content: space-between; }
.prod-icon {
  width: 40px; height: 40px; border-radius: 11px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(162, 144, 229, 0.14); color: var(--accent-deep);
  font-family: var(--serif); font-size: 16px; font-weight: 600;
}
.prod-badge { font-size: 11px; letter-spacing: 0.06em; padding: 4px 11px; border-radius: 999px; font-weight: 600; }
.prod-badge.soon { background: rgba(162, 144, 229, 0.14); color: var(--accent-deep); }
.prod-badge.beta { background: rgba(176, 125, 16, 0.12); color: #b07d10; }
.prod-badge.live { background: rgba(44, 122, 75, 0.1); color: #2c7a4b; }
.prod h3 { font-size: 17px; }
.prod p { color: var(--dim); font-size: 13px; line-height: 1.7; flex: 1; }
.prod-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.prod-tags span { font-size: 11.5px; color: var(--dim-2); border: 1px solid var(--line); border-radius: 999px; padding: 3px 9px; }
.prod-foot { margin-top: 4px; font-size: 12.5px; color: var(--dim-2); }
.prod-foot a { color: var(--accent-deep); font-weight: 600; text-decoration: none; }
.prod-foot a:hover { text-decoration: underline; }
.prod-wait { letter-spacing: 0.04em; }
.prod-note { margin-top: 48px; text-align: center; color: var(--dim); font-size: 14.5px; }
.prod-note a { color: var(--accent-deep); font-weight: 600; text-decoration: none; }
.prod-note a:hover { text-decoration: underline; }
.invest-panel {
  background: linear-gradient(135deg, rgba(162, 144, 229, 0.16), rgba(162, 144, 229, 0.04));
  border: 1px solid rgba(124, 107, 201, 0.2);
  border-radius: 32px;
  padding: 72px 64px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start;
}
.invest-copy h2 { font-size: clamp(30px, 3.6vw, 44px); }
.invest-points { list-style: none; margin-top: 36px; }
.invest-points li {
  padding: 10px 0 10px 30px; position: relative; font-size: 14.5px; color: var(--dim);
}
.invest-points li::before { content: "→"; position: absolute; left: 0; color: var(--accent-deep); }
.section-invest .lead-form { box-shadow: 0 24px 60px rgba(124, 107, 201, 0.18); }

/* ---------- 留资区块:深色对比 ---------- */
.section-contact { background: transparent; border-bottom: none; }
.contact-panel {
  background: var(--ink); color: #fff; border-radius: 32px;
  padding: 72px 64px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start;
  box-shadow: 0 34px 80px rgba(13, 13, 13, 0.3);
  position: relative; overflow: hidden;
}
.contact-panel::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(500px 340px at 88% 0%, rgba(162, 144, 229, 0.24), transparent 65%);
}
.contact-copy { position: relative; }
.contact-copy .eyebrow { color: rgba(255, 255, 255, 0.55); }
.contact-copy .eyebrow::before { background: var(--accent); }
.contact-copy h2 { color: #fff; font-size: clamp(30px, 3.6vw, 44px); }
.contact-copy .section-sub { color: rgba(255, 255, 255, 0.65); }
.contact-points { list-style: none; margin-top: 36px; }
.contact-points li {
  padding: 10px 0 10px 30px; position: relative; font-size: 14.5px; color: rgba(255, 255, 255, 0.78);
}
.contact-points li::before { content: "→"; position: absolute; left: 0; color: var(--accent); }
.lead-form {
  position: relative;
  background: #fff; color: var(--ink);
  border-radius: 22px; padding: 42px 38px;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.35);
}
.lead-form h3 { font-size: 21px; margin-bottom: 28px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 13px; color: var(--dim); margin-bottom: 8px; font-weight: 500; }
.field em { color: var(--accent-deep); font-style: normal; }
.field input, .field select, .field textarea {
  width: 100%; padding: 13px 16px; font-size: 15px; font-family: var(--sans);
  background: #f4f4f5; color: var(--ink);
  border: 1px solid var(--line); border-radius: 12px; outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.field input::placeholder, .field textarea::placeholder { color: var(--dim-2); }
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--accent-deep); background: #fff; box-shadow: 0 0 0 3px rgba(162, 144, 229, 0.25);
}
.field select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--dim) 50%), linear-gradient(135deg, var(--dim) 50%, transparent 50%); background-position: calc(100% - 21px) 50%, calc(100% - 15px) 50%; background-size: 6px 6px; background-repeat: no-repeat; }
.field textarea { resize: vertical; }
/* 商业计划书上传:点击 / 拖拽两用 */
.file-drop {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px; background: #f4f4f5;
  border: 1.5px dashed var(--line-2); border-radius: 12px;
  cursor: pointer; transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}
.file-drop:hover, .file-drop.drag {
  border-color: var(--accent-deep); background: rgba(162, 144, 229, 0.08);
}
.file-drop:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(162, 144, 229, 0.25); }
.file-drop.has-file { border-style: solid; border-color: var(--accent-deep); background: #fff; }
.file-drop-icon { color: var(--accent-deep); flex-shrink: 0; display: flex; }
.file-drop-text { font-size: 13.5px; color: var(--dim); line-height: 1.5; word-break: break-all; }
.file-drop.has-file .file-drop-text { color: var(--ink); font-weight: 600; }
.file-drop-clear {
  margin-left: auto; flex-shrink: 0; width: 26px; height: 26px;
  border: 1px solid var(--line); border-radius: 50%; background: #fff;
  color: var(--dim); font-size: 15px; line-height: 1; cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}
.file-drop-clear:hover { color: #c0392b; border-color: rgba(192, 57, 43, 0.4); }
.lead-form .btn-primary:hover { box-shadow: 0 14px 34px rgba(13, 13, 13, 0.3); }
.form-msg { margin-top: 14px; font-size: 14px; text-align: center; min-height: 20px; }
.form-msg.ok { color: #2c7a4b; }
.form-msg.err { color: #c0392b; }
.form-privacy { font-size: 12px; color: var(--dim-2); text-align: center; margin-top: 12px; }

/* ---------- 页脚 ---------- */
.footer { padding: 80px 0 46px; overflow: hidden; }
.footer-word {
  font-family: var(--serif); font-size: clamp(40px, 7vw, 96px); font-weight: 600; letter-spacing: 0.01em;
  line-height: 0.95; text-align: center; user-select: none; margin-bottom: 56px;
  color: transparent; -webkit-text-stroke: 1px rgba(13, 13, 13, 0.22);
}
.footer-inner {
  display: flex; justify-content: space-between; align-items: center; gap: 18px; flex-wrap: wrap;
  border-top: 1px solid var(--line); padding-top: 34px;
}
.footer-brand { font-family: var(--serif); font-weight: 600; font-size: 16px; }
.footer-dim { font-size: 12.5px; color: var(--dim); }

/* ---------- 滚动入场 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; transition-delay: var(--d, 0ms); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .marquee-track { animation: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero { padding: 72px 0 64px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { min-height: 380px; }
  .section { padding: 76px 0; }
  .plan-grid, .steps, .quote-grid, .prob-grid, .prod-grid { grid-template-columns: 1fr; }
  .contact-panel, .invest-panel { grid-template-columns: 1fr; gap: 44px; padding: 48px 28px; border-radius: 26px; }
  .svc-row { grid-template-columns: 60px 1fr 40px; gap: 16px; padding: 30px 4px; }

  /* 移动端导航 */
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: absolute; top: 68px; left: 16px; right: 16px;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--ink); border-radius: 22px; padding: 8px 0;
    box-shadow: 0 20px 50px rgba(13, 13, 13, 0.3);
    max-height: 0; overflow: hidden; transition: max-height 0.3s ease; padding-top: 0; padding-bottom: 0;
  }
  .nav-links.open { max-height: 440px; }
  .nav-links a { padding: 15px 24px; border-top: 1px solid rgba(255, 255, 255, 0.1); font-size: 15px; color: rgba(255, 255, 255, 0.85); }
  .nav-links a:first-child { border-top: none; }
  .nav-links .nav-cta {
    margin: 10px 16px 14px; padding: 12px 22px; text-align: center; border-top: none;
  }
}
@media (max-width: 540px) {
  .hero { padding: 60px 0 52px; }
  .hero-visual { min-height: 320px; }
  .hero-actions { gap: 18px; }
  .lead-form { padding: 32px 24px; }
  .footer-word { margin-bottom: 40px; }
}