/* ════════════════════════════════════════════════════════════════════════
   君翔计算机 · 官网样式
   设计语言：与「弱电造价协同平台」同一套视觉（主色 teal #00514b）。
   原则：不引外链字体 / 不用图标字体 / 动画只用 transform+opacity。
   ════════════════════════════════════════════════════════════════════════ */

/* ── 1. 设计 Token ───────────────────────────────────────────────── */
:root {
  /* 品牌色阶：与 platform.html 的 teal 色阶同源 */
  --b-950: #00332f;
  --b-900: #00403b;
  --b-800: #00514b;   /* 主色 */
  --b-700: #146760;
  --b-600: #158074;
  --b-500: #22a294;
  --b-400: #43bfae;
  --b-300: #79d8c9;
  --b-200: #aeeadf;
  --b-100: #d5f5ee;
  --b-50:  #eefbf8;

  /* 中性 */
  --ink:   #0b1c30;
  --ink-2: #334155;
  --muted: #64748b;
  --faint: #94a3b8;
  --line:  #dbe4ef;
  --line-soft: #eaf0f7;
  --bg:    #f6f8fb;
  --surface: #ffffff;

  /* 点睛色：只用在极少数"值得强调"的地方，占比 <5% */
  --amber: #d97a1f;
  --amber-bg: #fff5e8;
  --amber-line: #f5ddbe;

  /* 语义 */
  --ok: #158074;
  --err: #c0392b;

  /* 8pt 网格 */
  --s1: 4px;  --s2: 8px;  --s3: 12px; --s4: 16px;
  --s5: 20px; --s6: 24px; --s8: 32px; --s10: 40px;
  --s12: 48px; --s16: 64px; --s24: 96px;

  /* 圆角：统一的三个半径，不乱用 */
  --r-sm: 8px; --r: 12px; --r-lg: 18px; --r-pill: 999px;

  /* 阴影：只两层，克制 */
  --sh-1: 0 1px 2px rgba(11,28,48,.05), 0 2px 8px rgba(11,28,48,.04);
  --sh-2: 0 2px 6px rgba(11,28,48,.06), 0 16px 40px rgba(11,28,48,.09);
  --sh-3: 0 4px 12px rgba(11,28,48,.07), 0 32px 64px rgba(11,28,48,.13);

  /* 动效 */
  --e-out: cubic-bezier(.2,0,0,1);
  --e-spring: cubic-bezier(.34,1.4,.64,1);

  --wrap: 1200px;
  --nav-h: 72px;
}

/* ── 2. 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(--surface);
  color: var(--ink);
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei UI",
               "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC",
               system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  margin: 0;
  line-height: 1.24;
  letter-spacing: -.02em;
  font-weight: 700;
  color: var(--ink);
}
h1 { font-size: clamp(32px, 4.6vw, 56px); font-weight: 800; letter-spacing: -.03em; }
h2 { font-size: clamp(25px, 3.1vw, 38px); }
h3 { font-size: clamp(17px, 1.6vw, 20px); letter-spacing: -.01em; }
h4 { font-size: 16px; }
p  { margin: 0; }
ul, ol, dl, dd { margin: 0; padding: 0; list-style: none; }

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; }

.mono {
  font-family: ui-monospace, "SFMono-Regular", "Cascadia Mono", Consolas,
               "Liberation Mono", Menlo, monospace;
  font-size: .94em;
  letter-spacing: 0;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: 24px;
}

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 999;
  background: var(--b-800); color: #fff; padding: 10px 16px; border-radius: 0 0 var(--r-sm) 0;
}
.skip:focus { left: 0; }

:focus-visible {
  outline: 3px solid var(--b-400);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ── 3. 按钮 ─────────────────────────────────────────────────────── */
.btn {
  --btn-h: 42px;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: var(--btn-h);
  padding: 0 20px;
  border: 1.5px solid transparent;
  border-radius: 10px;
  font-size: 15px; font-weight: 600; letter-spacing: -.005em;
  white-space: nowrap; cursor: pointer;
  transition: background-color .18s var(--e-out), color .18s var(--e-out),
              border-color .18s var(--e-out), transform .18s var(--e-spring),
              box-shadow .18s var(--e-out);
}
.btn svg { width: 16px; height: 16px; flex: none; }
.btn:active { transform: translateY(1px) scale(.995); }

.btn-primary { background: var(--b-800); color: #fff; box-shadow: 0 1px 2px rgba(0,81,75,.2); }
.btn-primary:hover { background: var(--b-700); box-shadow: 0 4px 14px rgba(0,81,75,.22); transform: translateY(-1px); }

.btn-outline { background: var(--surface); color: var(--b-800); border-color: var(--line); }
.btn-outline:hover { border-color: var(--b-400); background: var(--b-50); transform: translateY(-1px); }

.btn-ghost { background: transparent; color: var(--ink-2); border-color: transparent; }
.btn-ghost:hover { background: var(--bg); color: var(--b-800); }

.btn-lg { --btn-h: 50px; padding: 0 26px; font-size: 16px; border-radius: 12px; }
.btn-block { width: 100%; }

/* ── 4. 导航 ─────────────────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 80;
  background: rgba(255,255,255,.86);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--e-out), box-shadow .25s var(--e-out);
}
.nav.stuck { border-bottom-color: var(--line); box-shadow: 0 1px 12px rgba(11,28,48,.05); }

.nav-inner { display: flex; align-items: center; gap: var(--s6); height: var(--nav-h); }

.brand { display: flex; align-items: center; gap: 10px; flex: none; }
.brand-mark svg { width: 36px; height: 36px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 16.5px; font-weight: 750; letter-spacing: -.01em; }
.brand-text em {
  font-style: normal; font-size: 11px; color: var(--muted);
  letter-spacing: .06em; margin-top: 1px;
}

.nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-links a {
  padding: 7px 13px; border-radius: 8px; font-size: 14.5px; font-weight: 500;
  color: var(--ink-2); transition: color .16s, background-color .16s;
}
.nav-links a:hover { color: var(--b-800); background: var(--b-50); }

.nav-actions { display: flex; align-items: center; gap: 8px; flex: none; }

/* 「平台入口」下拉 */
.entry-menu { position: relative; }
.caret { width: 12px; height: 12px; transition: transform .2s var(--e-out); }
.entry-menu.open .caret { transform: rotate(180deg); }

.entry-pop {
  position: absolute; top: calc(100% + 10px); right: 0; width: 300px;
  padding: 8px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-3);
  opacity: 0; visibility: hidden; transform: translateY(-8px) scale(.98);
  transform-origin: top right;
  transition: opacity .2s var(--e-out), transform .22s var(--e-spring), visibility .2s;
}
.entry-menu.open .entry-pop { opacity: 1; visibility: visible; transform: none; }

.entry-pop a {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 11px 12px; border-radius: 10px;
  transition: background-color .16s;
}
.entry-pop a:hover { background: var(--b-50); }
.entry-pop b { display: block; font-size: 14.5px; font-weight: 650; color: var(--ink); }
.entry-pop i {
  display: block; font-style: normal; font-size: 12.5px; color: var(--muted); margin-top: 2px;
}

.ep-ico {
  flex: none; width: 34px; height: 34px; border-radius: 9px;
  background: var(--b-100) center/18px 18px no-repeat;
}
.ep-ico-user {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300514b' stroke-width='1.9' stroke-linecap='round'%3E%3Ccircle cx='12' cy='8' r='3.4'/%3E%3Cpath d='M5 20c0-3.6 3.1-6 7-6s7 2.4 7 6'/%3E%3C/svg%3E");
}
.ep-ico-truck {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300514b' stroke-width='1.9' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M2.5 7h11v9h-11z'/%3E%3Cpath d='M13.5 10h4l4 3.4V16h-8z'/%3E%3Ccircle cx='6.5' cy='18' r='1.7'/%3E%3Ccircle cx='17.5' cy='18' r='1.7'/%3E%3C/svg%3E");
}
.ep-ico-shield {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300514b' stroke-width='1.9' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 3l7 3v6c0 4.2-2.9 7.6-7 9-4.1-1.4-7-4.8-7-9V6l7-3Z'/%3E%3Cpath d='M9 12.2l2 2 4-4.2'/%3E%3C/svg%3E");
}

/* 汉堡 */
.burger {
  display: none; width: 40px; height: 40px; padding: 0;
  background: transparent; border: 1px solid var(--line); border-radius: 10px;
  cursor: pointer; position: relative;
}
.burger span {
  position: absolute; left: 11px; width: 16px; height: 1.8px; border-radius: 2px;
  background: var(--ink-2); transition: transform .24s var(--e-out), opacity .18s;
}
.burger span:nth-child(1) { top: 14px; }
.burger span:nth-child(2) { top: 19px; }
.burger span:nth-child(3) { top: 24px; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* 移动抽屉 */
.drawer {
  border-top: 1px solid var(--line);
  background: var(--surface);
  padding: var(--s3) 24px var(--s6);
  animation: drawerIn .24s var(--e-out);
}
@keyframes drawerIn { from { opacity: 0; transform: translateY(-8px); } }
.drawer nav { display: flex; flex-direction: column; }
.drawer nav a { padding: 12px 4px; font-size: 16px; border-bottom: 1px solid var(--line-soft); }
.drawer-entries { display: grid; gap: 10px; margin-top: var(--s4); }
.drawer-entries > a:not(.btn) {
  padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px;
  font-size: 15px; font-weight: 600; color: var(--b-800);
}

/* ── 5. Hero ─────────────────────────────────────────────────────── */
.hero { position: relative; overflow: hidden; padding: clamp(56px, 7vw, 92px) 0 clamp(64px, 8vw, 104px); }
.hero-bg { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }

.hb-grid {
  position: absolute; inset: -2px;
  background-image:
    linear-gradient(to right, rgba(11,28,48,.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(11,28,48,.045) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 130% 92% at 62% 8%, #000 8%, transparent 68%);
  -webkit-mask-image: radial-gradient(ellipse 130% 92% at 62% 8%, #000 8%, transparent 68%);
}
.hb-orb { position: absolute; border-radius: 50%; filter: blur(72px); opacity: .5; }
.hb-orb-1 { width: 460px; height: 460px; right: -90px; top: -140px; background: radial-gradient(circle, var(--b-200), transparent 68%); }
.hb-orb-2 { width: 380px; height: 380px; left: -130px; bottom: -170px; background: radial-gradient(circle, var(--b-100), transparent 70%); }

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.06fr);
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px 6px 10px;
  background: var(--b-50); border: 1px solid var(--b-100);
  border-radius: var(--r-pill);
  font-size: 13px; font-weight: 600; color: var(--b-800);
  letter-spacing: .02em;
}
.eyebrow .dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--b-500);
  box-shadow: 0 0 0 3px rgba(34,162,148,.16);
}

.hero h1 { margin: 22px 0 0; }
.hero h1 .hl { position: relative; color: var(--b-800); white-space: nowrap; }
.hero h1 .hl::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: .06em; height: .3em;
  background: linear-gradient(90deg, var(--b-200), var(--b-100));
  border-radius: 3px; z-index: -1;
}

.lede {
  margin-top: 20px; max-width: 34em;
  font-size: clamp(15px, 1.35vw, 17px); color: var(--ink-2); line-height: 1.78;
}

.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

.hero-meta {
  display: flex; flex-wrap: wrap; gap: 0; margin-top: 40px;
  border-top: 1px solid var(--line-soft); padding-top: var(--s5);
}
.hero-meta li { display: flex; flex-direction: column; padding-right: 28px; margin-right: 28px; border-right: 1px solid var(--line-soft); }
.hero-meta li:last-child { border-right: 0; padding-right: 0; margin-right: 0; }
.hero-meta b { font-size: 22px; font-weight: 780; color: var(--b-800); letter-spacing: -.02em; }
.hero-meta span { font-size: 12.5px; color: var(--muted); margin-top: 1px; }

/* 平台界面示意 */
.hero-visual { position: relative; }
.pwin {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-3);
  overflow: hidden;
  transform: perspective(1600px) rotateY(-4deg) rotateX(1.5deg);
  transition: transform .6s var(--e-out);
}
.hero-visual:hover .pwin { transform: perspective(1600px) rotateY(-1.5deg) rotateX(.5deg); }

.pwin-bar {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px;
  background: var(--bg);
  border-bottom: 1px solid var(--line-soft);
}
.pdots { display: flex; gap: 5px; flex: none; }
.pdots i { width: 9px; height: 9px; border-radius: 50%; background: #d3dbe6; }
.pdots i:first-child { background: #e8b1a8; }
.pdots i:nth-child(2) { background: #ead6a4; }
.pdots i:nth-child(3) { background: #b6dcc8; }
.pwin-title { font-size: 12px; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.psync {
  margin-left: auto; flex: none;
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11.5px; font-weight: 600; color: var(--b-700);
  background: var(--b-50); border: 1px solid var(--b-100);
  padding: 3px 9px; border-radius: var(--r-pill);
}
.psync i {
  width: 6px; height: 6px; border-radius: 50%; background: var(--b-500);
  animation: pulse 2.2s var(--e-out) infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .32; } }

.pwin-body { display: grid; grid-template-columns: 116px minmax(0, 1fr); }
.pside {
  border-right: 1px solid var(--line-soft);
  padding: 12px 8px; display: flex; flex-direction: column; gap: 2px;
  background: #fcfdfe;
}
.pside-item {
  padding: 7px 10px; border-radius: 7px; font-size: 12.5px; color: var(--muted);
}
.pside-item.on { background: var(--b-50); color: var(--b-800); font-weight: 650; }

.pmain { padding: 10px 0 6px; min-width: 0; }
.prow-head, .prow {
  display: grid;
  grid-template-columns: 74px minmax(0,1fr) 52px 72px 78px;
  gap: 8px; align-items: center;
  padding: 7px 14px;
  font-size: 12px;
}
.prow-head {
  color: var(--faint); font-weight: 600; font-size: 11px;
  letter-spacing: .04em; border-bottom: 1px solid var(--line-soft); padding-bottom: 8px;
}
.prow { color: var(--ink-2); border-bottom: 1px solid #f2f6fb; }
.prow:last-child { border-bottom: 0; }
.prow > span:first-child { color: var(--b-700); font-weight: 600; font-size: 11.5px; }
.prow .num { text-align: right; font-variant-numeric: tabular-nums; }
.prow-head .num { text-align: right; }
.prow.ghost { opacity: .45; }

.pwin-foot {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding: 11px 14px; border-top: 1px solid var(--line-soft); background: #fcfdfe;
}
.pchip {
  font-size: 11.5px; font-weight: 600; color: var(--ink-2);
  background: var(--bg); border: 1px solid var(--line-soft);
  padding: 4px 10px; border-radius: var(--r-pill);
}
.pchip.pass { color: var(--b-800); background: var(--b-50); border-color: var(--b-100); }

.mock-note {
  margin-top: 12px; text-align: right;
  font-size: 11.5px; color: var(--faint);
}

/* ── 6. 信任条 ───────────────────────────────────────────────────── */
.strip { border-block: 1px solid var(--line-soft); background: var(--bg); }
.strip-inner {
  display: flex; align-items: center; gap: var(--s6); flex-wrap: wrap;
  padding-block: 18px;
}
.strip-label { font-size: 13px; font-weight: 700; color: var(--b-800); letter-spacing: .03em; flex: none; }
.strip-items { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.strip-items li {
  position: relative; font-size: 13.5px; color: var(--ink-2); padding-left: 14px;
}
.strip-items li::before {
  content: ""; position: absolute; left: 0; top: .62em;
  width: 5px; height: 5px; border-radius: 50%; background: var(--b-400);
}

/* ── 7. 通用区块 ─────────────────────────────────────────────────── */
.sec { padding: clamp(64px, 8vw, 112px) 0; }
.sec-tight { padding-top: clamp(48px, 6vw, 72px); }
.sec-alt { background: var(--bg); }

.sec-head { max-width: 720px; margin-bottom: clamp(36px, 4.4vw, 56px); }
.kicker {
  font-size: 12.5px; font-weight: 750; letter-spacing: .16em;
  color: var(--b-600); text-transform: uppercase; margin-bottom: 12px;
}
.sec-head h2 { margin-bottom: 14px; }
.sec-sub { font-size: 16px; color: var(--muted); line-height: 1.8; }
.sec-sub b { color: var(--b-700); font-weight: 650; }

/* ── 8. 痛点 ─────────────────────────────────────────────────────── */
.pain-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
.pain {
  position: relative;
  padding: 28px 24px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  transition: border-color .2s, box-shadow .25s var(--e-out), transform .25s var(--e-out);
}
.pain:hover { border-color: var(--b-300); box-shadow: var(--sh-2); transform: translateY(-3px); }
.pain-no {
  position: absolute; top: 18px; right: 22px;
  font-size: 34px; font-weight: 800; letter-spacing: -.04em;
  color: var(--b-100); line-height: 1;
}
.pain h3 { margin-bottom: 10px; }
.pain p { font-size: 14.5px; color: var(--muted); }
.pain-fix {
  display: block; margin-top: 18px; padding-top: 16px;
  border-top: 1px dashed var(--line);
  font-size: 13.5px; font-weight: 600; color: var(--b-700);
}

/* ── 9. 能力卡 ───────────────────────────────────────────────────── */
.feat-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.feat {
  padding: 26px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  transition: border-color .2s, box-shadow .25s var(--e-out), transform .25s var(--e-out);
}
.feat:hover { border-color: var(--b-300); box-shadow: var(--sh-2); transform: translateY(-3px); }
.fi {
  display: grid; place-items: center;
  width: 44px; height: 44px; margin-bottom: 18px;
  background: var(--b-50); border: 1px solid var(--b-100); border-radius: 12px;
}
.fi svg { width: 22px; height: 22px; fill: none; stroke: var(--b-700); stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; }
.feat h3 { margin-bottom: 9px; font-size: 17.5px; }
.feat p { font-size: 14.5px; color: var(--muted); line-height: 1.75; }

/* ── 10. 交付形态 ────────────────────────────────────────────────── */
.forms { margin-top: clamp(48px, 5vw, 72px); }
.forms-title {
  font-size: 16px; font-weight: 650; color: var(--ink-2);
  padding-bottom: 18px; margin-bottom: 22px; border-bottom: 1px solid var(--line);
}
.form-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 16px; }
.form-card {
  padding: 22px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r);
  transition: border-color .2s, transform .25s var(--e-out), box-shadow .25s var(--e-out);
}
.form-card:hover { transform: translateY(-3px); box-shadow: var(--sh-1); border-color: var(--b-300); }
.form-card .tag {
  display: inline-block; padding: 3px 10px; margin-bottom: 14px;
  font-size: 12px; font-weight: 700; letter-spacing: .04em;
  color: var(--muted); background: var(--bg); border-radius: var(--r-pill);
}
.form-card.on { border-color: var(--b-300); background: linear-gradient(180deg, var(--b-50), var(--surface) 40%); }
.form-card.on .tag { color: var(--b-800); background: var(--b-100); }
.form-card h4 { margin-bottom: 8px; font-size: 15.5px; }
.form-card p { font-size: 13.5px; color: var(--muted); line-height: 1.7; }

/* ── 11. 套餐 ────────────────────────────────────────────────────── */
.plan-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; align-items: start; }
.plan {
  position: relative;
  padding: 30px 26px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  transition: border-color .2s, box-shadow .25s var(--e-out), transform .25s var(--e-out);
}
.plan:hover { box-shadow: var(--sh-2); transform: translateY(-3px); }
.plan h3 { font-size: 20px; }
.plan-for { margin: 6px 0 20px; font-size: 14px; color: var(--muted); }
.plan ul { display: grid; gap: 10px; margin-bottom: 26px; }
.plan li {
  position: relative; padding-left: 24px;
  font-size: 14.5px; color: var(--ink-2);
}
.plan li::before {
  content: ""; position: absolute; left: 0; top: .42em;
  width: 15px; height: 15px; border-radius: 50%;
  background: var(--b-100) center/9px 9px no-repeat;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' fill='none' stroke='%2300514b' stroke-width='2.1' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M2.5 6.4 4.8 8.7 9.5 3.8'/%3E%3C/svg%3E");
}
.plan-hot { border-color: var(--b-400); box-shadow: var(--sh-2); }
.plan-hot::before {
  content: ""; position: absolute; inset: -1px; border-radius: inherit;
  border: 1.5px solid var(--b-400); pointer-events: none;
}
.plan-badge {
  position: absolute; top: -11px; left: 26px;
  padding: 4px 12px; border-radius: var(--r-pill);
  background: var(--b-800); color: #fff;
  font-size: 11.5px; font-weight: 700; letter-spacing: .04em;
}

/* ── 12. 三个入口 ────────────────────────────────────────────────── */
.entry-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
.entry-card {
  position: relative; display: flex; flex-direction: column;
  padding: 30px 26px 26px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  transition: border-color .2s, box-shadow .25s var(--e-out), transform .25s var(--e-out);
}
.entry-card:hover { border-color: var(--b-500); box-shadow: var(--sh-2); transform: translateY(-4px); }
.ec-ico {
  display: grid; place-items: center;
  width: 50px; height: 50px; margin-bottom: 20px;
  background: var(--b-800); border-radius: 14px;
  box-shadow: 0 6px 18px rgba(0,81,75,.2);
}
.ec-ico svg { width: 25px; height: 25px; fill: none; stroke: #fff; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.entry-card h3 { margin-bottom: 10px; }
.entry-card p { font-size: 14.5px; color: var(--muted); line-height: 1.75; flex: 1; }
.ec-go {
  display: inline-flex; align-items: center; gap: 7px;
  margin-top: 22px; font-size: 14.5px; font-weight: 650; color: var(--b-800);
}
.ec-go svg { width: 16px; height: 16px; transition: transform .22s var(--e-spring); }
.entry-card:hover .ec-go svg { transform: translateX(4px); }
.ec-note {
  margin-top: 12px; font-style: normal; font-size: 12px; color: var(--faint);
}

/* ── 13. 解决方案 ────────────────────────────────────────────────── */
.sol-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; }
.sol {
  padding: 24px 22px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--b-400);
  border-radius: var(--r);
  transition: transform .25s var(--e-out), box-shadow .25s var(--e-out), border-left-color .2s;
}
.sol:hover { transform: translateX(3px); box-shadow: var(--sh-1); border-left-color: var(--b-800); }
.sol h3 { font-size: 16px; margin-bottom: 8px; }
.sol p { font-size: 14px; color: var(--muted); line-height: 1.7; }

.flow { margin-top: clamp(48px, 5vw, 72px); }
.flow-title {
  font-size: 16px; font-weight: 650; color: var(--ink-2);
  padding-bottom: 18px; margin-bottom: 24px; border-bottom: 1px solid var(--line);
}
.flow-list { display: grid; grid-template-columns: repeat(6, minmax(0,1fr)); gap: 14px; counter-reset: step; }
.flow-list li {
  position: relative; padding-top: 34px;
  font-size: 14px;
}
.flow-list li::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  position: absolute; top: 0; left: 0;
  display: grid; place-items: center;
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--b-50); border: 1px solid var(--b-200);
  font-size: 11px; font-weight: 750; color: var(--b-800);
}
.flow-list li::after {
  content: ""; position: absolute; top: 12px; left: 32px; right: -8px; height: 1px;
  background: linear-gradient(90deg, var(--b-200), var(--line-soft));
}
.flow-list li:last-child::after { display: none; }
.flow-list b { display: block; font-size: 15px; margin-bottom: 5px; }
.flow-list span { display: block; font-size: 13px; color: var(--muted); line-height: 1.62; }

/* ── 14. 关于我们 ────────────────────────────────────────────────── */
.about { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); gap: clamp(32px, 4.4vw, 60px); }
.about-copy h2 { margin: 12px 0 18px; font-size: clamp(23px, 2.7vw, 32px); }
.about-lede { font-size: 16.5px; color: var(--ink-2); line-height: 1.8; margin-bottom: 16px; }
.about-copy > p:not(.kicker):not(.about-lede) { font-size: 15px; color: var(--muted); margin-bottom: 28px; }

.facts { display: grid; gap: 0; border-top: 1px solid var(--line); }
.facts > div {
  display: grid; grid-template-columns: 150px minmax(0,1fr); gap: 16px;
  padding: 13px 0; border-bottom: 1px solid var(--line-soft);
}
.facts dt { font-size: 13.5px; color: var(--muted); }
.facts dd { font-size: 14px; color: var(--ink); line-height: 1.7; }

.about-side { display: grid; gap: 14px; align-content: start; }
.side-card {
  padding: 22px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r);
}
.side-card h4 { font-size: 14px; color: var(--b-800); margin-bottom: 8px; }
.side-card p { font-size: 13.5px; color: var(--muted); line-height: 1.72; }

/* ── 15. 留言 ────────────────────────────────────────────────────── */
.contact { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr); gap: clamp(32px, 4.4vw, 64px); align-items: start; }
.contact-copy h2 { margin: 12px 0 16px; }
.contact-copy > p { font-size: 15.5px; color: var(--muted); line-height: 1.8; }
.contact-tips { display: grid; gap: 9px; margin-top: 24px; }
.contact-tips li { font-size: 13.5px; color: var(--faint); }

.msg-form {
  padding: clamp(24px, 3vw, 32px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-1);
}
.fld { display: grid; gap: 7px; margin-bottom: 16px; min-width: 0; }
.fld-row { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.msg-form label { font-size: 13.5px; font-weight: 600; color: var(--ink-2); }
.msg-form label i { color: var(--amber); font-style: normal; }

.msg-form input, .msg-form select, .msg-form textarea {
  width: 100%; padding: 11px 14px;
  background: var(--surface);
  border: 1.5px solid var(--line);
  border-radius: 10px;
  font: inherit; font-size: 15px; color: var(--ink);
  transition: border-color .18s, box-shadow .18s, background-color .18s;
  appearance: none;
}
.msg-form textarea { resize: vertical; min-height: 96px; line-height: 1.65; }
.msg-form select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' fill='none' stroke='%2364748b' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M2.5 4.5 6 8l3.5-3.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center; background-size: 12px;
  padding-right: 36px;
}
.msg-form input::placeholder, .msg-form textarea::placeholder { color: var(--faint); }
.msg-form input:hover, .msg-form textarea:hover, .msg-form select:hover { border-color: #c6d3e2; }
.msg-form input:focus, .msg-form textarea:focus, .msg-form select:focus {
  outline: none; border-color: var(--b-500); box-shadow: 0 0 0 3px rgba(34,162,148,.14);
}
.msg-form .invalid { border-color: #e0a49c; background: #fffafa; }
.msg-form .invalid:focus { box-shadow: 0 0 0 3px rgba(192,57,43,.12); }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form-note { margin-top: 14px; font-size: 12.5px; color: var(--faint); text-align: center; }

.form-status {
  margin-top: 16px; padding: 12px 16px; border-radius: 10px;
  font-size: 14px; font-weight: 600;
}
.form-status.ok { background: var(--b-50); border: 1px solid var(--b-200); color: var(--b-800); }
.form-status.err { background: #fdf3f2; border: 1px solid #f0cdc8; color: var(--err); }

/* ── 16. 页脚 ────────────────────────────────────────────────────── */
.foot { background: var(--b-950); color: #c9dbd8; padding-top: clamp(48px, 5.5vw, 72px); }
.foot-inner {
  display: grid; grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr));
  gap: 32px; padding-bottom: 40px;
}
.foot-brand strong { display: block; font-size: 19px; color: #fff; font-weight: 750; letter-spacing: -.01em; }
.foot-brand p { margin-top: 8px; font-size: 13.5px; color: rgba(201,219,216,.78); }
.foot-sub { color: rgba(201,219,216,.55) !important; }

.foot-col { display: flex; flex-direction: column; gap: 10px; }
.foot-col h4 { font-size: 13px; color: #fff; letter-spacing: .08em; margin-bottom: 4px; font-weight: 650; }
.foot-col a, .foot-col p { font-size: 13.5px; color: rgba(201,219,216,.72); transition: color .16s; }
.foot-col a:hover { color: var(--b-300); }

.foot-base {
  display: flex; flex-wrap: wrap; gap: 8px 24px; align-items: center; justify-content: space-between;
  padding-block: 22px;
  border-top: 1px solid rgba(255,255,255,.1);
}
.foot-base p { font-size: 12.5px; color: rgba(201,219,216,.55); }
.foot-beian a { color: rgba(201,219,216,.62); }
.foot-beian a:hover { color: var(--b-300); }
/* 曾经有一个 .todo 高亮样式，用来标出页脚「待填写」的 ICP 备案号占位。
   真实号码（鄂ICP备2021013480号-2）填进来后它就没人用了，故删除。
   ★ 如果哪天又需要"待填"样式，先想清楚：那是有人在往回退占位 —— 那是发版事故。 */

/* ── 17. 滚动入场 ────────────────────────────────────────────────── */
.rv { opacity: 0; transform: translateY(18px); }
.rv.in {
  opacity: 1; transform: none;
  transition: opacity .62s var(--e-out), transform .62s var(--e-out);
}

/* ── 18. 响应式 ──────────────────────────────────────────────────── */
@media (max-width: 1080px) {
  .nav-links { display: none; }
  .burger { display: block; }
  .hero-inner { grid-template-columns: 1fr; }
  .pwin { transform: none; }
  .hero-visual:hover .pwin { transform: none; }
  .hero-meta { margin-top: 32px; }
  .feat-grid, .sol-grid, .plan-grid, .entry-grid, .pain-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .form-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .flow-list { grid-template-columns: repeat(3, minmax(0,1fr)); row-gap: 26px; }
  .flow-list li:nth-child(3n)::after { display: none; }
  .about, .contact { grid-template-columns: 1fr; }
  .foot-inner { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 28px; }
}

@media (max-width: 720px) {
  :root { --nav-h: 64px; }
  .wrap { padding-inline: 18px; }
  .brand-text em { display: none; }
  .nav-actions .btn-ghost span { display: none; }
  .feat-grid, .sol-grid, .plan-grid, .entry-grid, .pain-grid,
  .form-grid, .flow-list { grid-template-columns: 1fr; }
  .flow-list li::after { display: none; }
  .flow-list { row-gap: 20px; }
  .hero-meta { gap: 18px; }
  .hero-meta li { border-right: 0; padding-right: 0; margin-right: 0; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { width: 100%; }
  .facts > div { grid-template-columns: 1fr; gap: 4px; }
  .foot-inner { grid-template-columns: 1fr; }
  /* 窄屏下平台窗口的表格列收窄：只留「名称 + 合价」两列，其余隐藏 */
  .prow-head, .prow { grid-template-columns: minmax(0,1fr) 76px; }
  .prow-head > span:nth-child(1), .prow > span:nth-child(1),
  .prow-head > span:nth-child(3), .prow > span:nth-child(3),
  .prow-head > span:nth-child(4), .prow > span:nth-child(4) { display: none; }
  .pside { display: none; }
  .pwin-body { grid-template-columns: minmax(0,1fr); }
}

@media (max-width: 420px) {
  .nav-actions .btn-primary { display: none; }
  .hero h1 .hl { white-space: normal; }
}

/* ── 20. 404 页 ──────────────────────────────────────────────────── */
/* 这些样式刻意用类名而不是内联 style：本站 CSP 为 `style-src 'self'`，
   内联样式会被浏览器拦掉（页面看起来像"CSS 没加载"）。 */
.nf-body { background: var(--surface); }
.nf { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.nf-inner { max-width: 520px; text-align: center; }
.nf-brand { display: inline-flex; align-items: center; gap: 10px; margin-bottom: 28px; }
.nf-brand strong { font-size: 17px; letter-spacing: -.01em; }
.nf-code {
  margin: 0 0 12px;
  font-size: clamp(52px, 12vw, 68px); font-weight: 800;
  line-height: 1; letter-spacing: -.04em; color: var(--b-800);
}
.nf-inner h1 { font-size: 22px; margin-bottom: 12px; }
.nf-text { color: var(--muted); line-height: 1.8; margin-bottom: 28px; }
.nf-actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }

/* ── 21. 降级 ────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
  .rv { opacity: 1; transform: none; }
}

@media print {
  .nav, .drawer, .msg-form, .entry-pop { display: none; }
  .sec { padding: 24px 0; }
  .rv { opacity: 1; transform: none; }
}