/* ============================================================
   母核集团 MUHE GROUP — 官网设计系统
   全内联、零外部依赖（字体使用系统字体栈）
   ============================================================ */

:root {
  --bg-0: #04070e;
  --bg-1: #070c18;
  --bg-2: #0b1222;
  --surface: rgba(255, 255, 255, 0.035);
  --surface-2: rgba(255, 255, 255, 0.062);
  --line: rgba(122, 175, 255, 0.13);
  --line-2: rgba(122, 175, 255, 0.28);
  --txt: #e9f0fa;
  --txt-2: #a6b8d2;
  --txt-3: #6c7f9e;
  --cyan: #29e0f5;
  --blue: #4b7bff;
  --violet: #a66bff;
  --ok: #35d6a4;
  --danger: #ff5f6d;
  --grad: linear-gradient(115deg, #29e0f5 0%, #4b7bff 48%, #a66bff 100%);
  --radius: 16px;
  --radius-lg: 22px;
  --shadow: 0 26px 64px -30px rgba(0, 18, 56, 0.95);
  --maxw: 1240px;
  --nav-h: 72px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg-0);
  color: var(--txt);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(900px 520px at 78% -6%, rgba(41, 224, 245, 0.14), transparent 62%),
    radial-gradient(760px 520px at 6% 8%, rgba(166, 107, 255, 0.12), transparent 60%),
    radial-gradient(1000px 600px at 50% 108%, rgba(75, 123, 255, 0.12), transparent 62%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
  background-image:
    linear-gradient(rgba(122, 175, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(122, 175, 255, 0.055) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(circle at 50% 22%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 22%, #000 0%, transparent 78%);
}

main, header.site-header, footer.site-footer { position: relative; z-index: 1; }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
input, textarea, select { font: inherit; }

::selection { background: rgba(41, 224, 245, 0.28); }

/* ------------------------- 排版 ------------------------- */

h1, h2, h3, h4 { margin: 0; line-height: 1.22; letter-spacing: -0.01em; font-weight: 700; }
p { margin: 0; }

.h1 { font-size: clamp(2.1rem, 5.2vw, 3.65rem); letter-spacing: -0.025em; }
.h2 { font-size: clamp(1.6rem, 3.2vw, 2.5rem); letter-spacing: -0.02em; }
.h3 { font-size: clamp(1.15rem, 1.7vw, 1.4rem); }
.lead { color: var(--txt-2); font-size: clamp(1rem, 1.35vw, 1.12rem); }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: rgba(41, 224, 245, 0.06);
  color: #9fe9f7;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  font-weight: 500;
}
.eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(41, 224, 245, 0.16);
}

/* ------------------------- 布局 ------------------------- */

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.container.narrow { max-width: 900px; }

.section { padding: clamp(64px, 8vw, 112px) 0; }
.section.tight { padding: clamp(48px, 5.5vw, 72px) 0; }

.section-head { max-width: 760px; margin-bottom: clamp(34px, 4vw, 56px); }
.section-head .eyebrow { margin-bottom: 18px; }
.section-head p { margin-top: 16px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

.grid { display: grid; gap: 20px; }
.g-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.g-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }

.split { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(28px, 5vw, 72px); align-items: center; }

/* ------------------------- 按钮 ------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: transform 0.18s ease, box-shadow 0.24s ease, background 0.24s ease, border-color 0.24s ease, opacity 0.2s;
  white-space: nowrap;
}
.btn svg { width: 17px; height: 17px; flex: none; }
.btn-primary {
  background: var(--grad);
  color: #04121c;
  box-shadow: 0 14px 34px -14px rgba(41, 224, 245, 0.7);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 20px 44px -14px rgba(75, 123, 255, 0.85); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--line-2);
  color: var(--txt);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.09); border-color: rgba(122, 175, 255, 0.44); transform: translateY(-2px); }
.btn-quiet { background: transparent; color: var(--txt-2); }
.btn-quiet:hover { color: var(--txt); }
.btn-sm { min-height: 38px; padding: 0 16px; font-size: 0.87rem; border-radius: 10px; }
.btn-block { width: 100%; }
.btn[disabled] { opacity: 0.5; pointer-events: none; }

.link-arrow {
  display: inline-flex; align-items: center; gap: 7px;
  color: #8fd8ec; font-weight: 600; font-size: 0.92rem;
}
.link-arrow svg { width: 15px; height: 15px; transition: transform 0.2s; }
.link-arrow:hover svg { transform: translateX(4px); }

/* ------------------------- 卡片 ------------------------- */

.card {
  position: relative;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.058), rgba(255, 255, 255, 0.018));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform 0.28s cubic-bezier(0.22, 0.61, 0.36, 1), border-color 0.28s, box-shadow 0.28s, background 0.28s;
  overflow: hidden;
}
.card::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(420px 180px at 12% 0%, rgba(41, 224, 245, 0.13), transparent 70%);
  opacity: 0; transition: opacity 0.3s;
  pointer-events: none;
}
.card:hover { transform: translateY(-4px); border-color: var(--line-2); box-shadow: var(--shadow); }
.card:hover::after { opacity: 1; }

.card-icon {
  width: 48px; height: 48px;
  border-radius: 13px;
  display: grid; place-items: center;
  background: rgba(41, 224, 245, 0.1);
  border: 1px solid rgba(41, 224, 245, 0.24);
  color: var(--cyan);
  margin-bottom: 18px;
}
.card-icon svg { width: 24px; height: 24px; }
.card h3 { font-size: 1.12rem; margin-bottom: 8px; }
.card .card-sub { color: #86d9ec; font-size: 0.86rem; font-weight: 500; margin-bottom: 10px; }
.card p { color: var(--txt-2); font-size: 0.93rem; }

.card ul { list-style: none; margin: 16px 0 0; padding: 0; display: grid; gap: 8px; }
.card ul li {
  position: relative; padding-left: 20px;
  color: var(--txt-2); font-size: 0.88rem;
}
.card ul li::before {
  content: ""; position: absolute; left: 2px; top: 9px;
  width: 6px; height: 6px; border-radius: 2px;
  background: var(--grad);
}

/* ------------------------- 顶部导航 ------------------------- */

.site-header {
  position: sticky; top: 0; z-index: 60;
  height: var(--nav-h);
  display: flex; align-items: center;
  border-bottom: 1px solid transparent;
  transition: background 0.3s, border-color 0.3s, backdrop-filter 0.3s;
}
.site-header.scrolled {
  background: rgba(5, 9, 18, 0.82);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom-color: var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; gap: 20px; width: 100%; }

.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand-mark { width: 36px; height: 36px; flex: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-cn { font-size: 2.5rem; font-weight: 700; letter-spacing: 0.06em; }
.brand-en { font-size: 0.8rem; color: var(--txt-3); letter-spacing: 0.22em; text-transform: uppercase; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 9px 15px; border-radius: 10px;
  color: var(--txt-2); font-size: 0.94rem; font-weight: 500;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover { color: var(--txt); background: rgba(255, 255, 255, 0.05); }
.nav-links a.active { color: var(--txt); background: rgba(41, 224, 245, 0.1); }

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

.user-chip {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 5px 14px 5px 5px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.045);
  transition: border-color 0.2s, background 0.2s;
}
.user-chip:hover { border-color: rgba(41, 224, 245, 0.5); background: rgba(41, 224, 245, 0.08); }
.avatar {
  width: 30px; height: 30px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--grad); color: #04121c;
  font-size: 0.8rem; font-weight: 700; overflow: hidden; flex: none;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.user-chip span { font-size: 0.86rem; color: var(--txt-2); max-width: 92px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border-radius: 11px;
  border: 1px solid var(--line-2);
  background: rgba(255, 255, 255, 0.04);
  color: var(--txt);
  place-items: center;
}
.nav-toggle svg { width: 21px; height: 21px; }

/* ------------------------- 首页 Hero ------------------------- */

.hero { padding: clamp(56px, 8vw, 104px) 0 clamp(48px, 6vw, 88px); }
.hero .split { align-items: center; }
.hero h1 { margin: 22px 0 20px; }
.hero .lead { max-width: 560px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 32px; }

.hero-visual { display: grid; place-items: center; }
.nucleus { width: min(100%, 460px); height: auto; }

.orbit { animation: spin 30s linear infinite; transform-box: view-box; transform-origin: 50% 50%; }
.orbit.o2 { animation-duration: 20s; animation-direction: reverse; }
.orbit.o3 { animation-duration: 42s; }
.orbit.o4 { animation-duration: 26s; animation-direction: reverse; }

@keyframes spin { to { transform: rotate(360deg); } }

.pulse-ring { animation: pulseRing 4.6s ease-out infinite; transform-box: view-box; transform-origin: 50% 50%; }
.pulse-ring.d2 { animation-delay: 1.5s; }
.pulse-ring.d3 { animation-delay: 3s; }
@keyframes pulseRing {
  0% { transform: scale(0.62); opacity: 0.6; }
  100% { transform: scale(1.25); opacity: 0; }
}

.float-slow { animation: floatY 7s ease-in-out infinite; }
@keyframes floatY { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-9px); } }

/* ------------------------- 数据条 ------------------------- */

.stats-band {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.stat { background: rgba(6, 11, 22, 0.72); padding: 26px 22px; }
.stat-num {
  font-size: clamp(1.5rem, 2.6vw, 2.05rem);
  font-weight: 700; letter-spacing: -0.02em;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat-label { color: var(--txt-2); font-size: 0.88rem; margin-top: 6px; }

/* ------------------------- 产业版图 ------------------------- */

.industry-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.industry {
  position: relative;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.012));
  transition: transform 0.26s, border-color 0.26s, background 0.26s;
  overflow: hidden;
}
.industry::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 2px;
  background: var(--grad); opacity: 0; transition: opacity 0.26s;
}
.industry:hover { transform: translateY(-3px); border-color: var(--line-2); background: rgba(41, 224, 245, 0.055); }
.industry:hover::before { opacity: 1; }
.industry-head { display: flex; align-items: center; gap: 11px; margin-bottom: 10px; }
.industry-head svg { width: 22px; height: 22px; color: var(--cyan); flex: none; }
.industry-head h3 { font-size: 1rem; }
.industry p { color: var(--txt-3); font-size: 0.83rem; line-height: 1.6; }
.industry-tag {
  display: inline-block; margin-top: 12px;
  font-size: 0.74rem; color: #8fd8ec;
  padding: 3px 10px; border-radius: 999px;
  background: rgba(41, 224, 245, 0.09);
  border: 1px solid rgba(41, 224, 245, 0.2);
}

/* ------------------------- 流程 ------------------------- */

.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; counter-reset: step; }
.step { position: relative; padding-top: 8px; }
.step-num {
  width: 42px; height: 42px; border-radius: 12px;
  display: grid; place-items: center;
  font-weight: 700; font-size: 0.98rem;
  background: rgba(75, 123, 255, 0.14);
  border: 1px solid rgba(75, 123, 255, 0.32);
  color: #b6c9ff;
  margin-bottom: 16px;
}
.step h3 { font-size: 1.02rem; margin-bottom: 8px; }
.step p { color: var(--txt-2); font-size: 0.88rem; }
.step::after {
  content: ""; position: absolute; top: 29px; right: -9px; width: 18px; height: 1px;
  background: var(--line-2);
}
.step:last-child::after { display: none; }

/* ------------------------- CTA 区块 ------------------------- */

.cta-band {
  position: relative;
  border: 1px solid var(--line-2);
  border-radius: var(--radius-lg);
  padding: clamp(34px, 4.4vw, 58px);
  background:
    radial-gradient(720px 320px at 12% 0%, rgba(41, 224, 245, 0.16), transparent 66%),
    radial-gradient(620px 320px at 92% 110%, rgba(166, 107, 255, 0.18), transparent 66%),
    linear-gradient(160deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.015));
  display: flex; align-items: center; justify-content: space-between; gap: 30px;
  flex-wrap: wrap;
  overflow: hidden;
}
.cta-band h2 { max-width: 620px; }
.cta-band .lead { margin-top: 12px; max-width: 560px; }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ------------------------- 页内 Hero ------------------------- */

.page-hero { padding: clamp(48px, 6vw, 84px) 0 clamp(26px, 3vw, 40px); }
.breadcrumb { display: flex; align-items: center; gap: 8px; color: var(--txt-3); font-size: 0.84rem; margin-bottom: 16px; }
.breadcrumb a:hover { color: var(--cyan); }
.page-hero h1 { margin-bottom: 16px; }
.page-hero .lead { max-width: 720px; }

/* ------------------------- 关于我们 ------------------------- */

.value-card { text-align: left; }
.model-figure {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.015));
  padding: 22px;
}
.model-figure svg { width: 100%; height: auto; }
.model-caption { text-align: center; color: var(--txt-3); font-size: 0.84rem; margin-top: 10px; }

.timeline { position: relative; padding-left: 30px; }
.timeline::before {
  content: ""; position: absolute; left: 7px; top: 8px; bottom: 8px; width: 1px;
  background: linear-gradient(180deg, rgba(41, 224, 245, 0.7), rgba(166, 107, 255, 0.5), transparent);
}
.tl-item { position: relative; padding-bottom: 30px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: ""; position: absolute; left: -30px; top: 7px;
  width: 15px; height: 15px; border-radius: 50%;
  background: var(--bg-1);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(41, 224, 245, 0.12);
}
.tl-year { font-size: 0.88rem; font-weight: 700; color: #8fd8ec; letter-spacing: 0.06em; }
.tl-item h3 { font-size: 1.05rem; margin: 6px 0 7px; }
.tl-item p { color: var(--txt-2); font-size: 0.9rem; }

.info-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.info-list li { display: flex; gap: 12px; align-items: flex-start; }
.info-list svg { width: 19px; height: 19px; color: var(--cyan); flex: none; margin-top: 3px; }
.info-list li > [data-icon] { flex: none; display: inline-flex; align-items: center; }
.info-list b { display: block; font-size: 0.95rem; }
.info-list span { color: var(--txt-2); font-size: 0.88rem; }

/* ------------------------- 产品服务 ------------------------- */

.tabs { display: inline-flex; gap: 6px; padding: 5px; border: 1px solid var(--line); border-radius: 13px; background: rgba(255, 255, 255, 0.035); flex-wrap: wrap; }
.tab {
  padding: 9px 20px; border-radius: 9px; border: 0; background: transparent;
  color: var(--txt-2); font-size: 0.92rem; font-weight: 600;
  transition: background 0.22s, color 0.22s;
}
.tab:hover { color: var(--txt); }
.tab.active { background: rgba(41, 224, 245, 0.14); color: #a9ecf9; }

.chip-row { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  padding: 9px 16px; border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.035);
  color: var(--txt-2); font-size: 0.87rem;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.chip:hover { border-color: var(--line-2); color: var(--txt); background: rgba(41, 224, 245, 0.07); }

/* ------------------------- 表单 ------------------------- */

.field { margin-bottom: 18px; }
.field label { display: block; font-size: 0.87rem; color: var(--txt-2); margin-bottom: 8px; font-weight: 500; }
.field label .req { color: var(--danger); margin-left: 3px; }

.input, .textarea, .select {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  font-size: 16px;
  color: var(--txt);
  background: rgba(4, 8, 16, 0.6);
  border: 1px solid var(--line-2);
  border-radius: 11px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.textarea { min-height: 128px; resize: vertical; line-height: 1.65; }
.select { appearance: none; background-image: none; }
.input::placeholder, .textarea::placeholder { color: #55677f; }
.input:focus, .textarea:focus, .select:focus {
  border-color: rgba(41, 224, 245, 0.62);
  box-shadow: 0 0 0 4px rgba(41, 224, 245, 0.12);
  background: rgba(4, 8, 16, 0.85);
}
.input.invalid, .textarea.invalid { border-color: rgba(255, 95, 109, 0.6); }

.field-error { color: #ff8f99; font-size: 0.82rem; margin-top: 7px; display: none; }
.field-error.show { display: block; }

.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.code-row { display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: start; }
.code-row .btn { min-height: 48px; }

.checkbox { display: flex; gap: 10px; align-items: flex-start; color: var(--txt-2); font-size: 0.85rem; line-height: 1.6; }
.checkbox input { width: 17px; height: 17px; margin-top: 3px; accent-color: #29e0f5; flex: none; }

.file-drop {
  border: 1px dashed var(--line-2);
  border-radius: 12px;
  padding: 18px;
  text-align: center;
  color: var(--txt-3);
  font-size: 0.87rem;
  background: rgba(255, 255, 255, 0.02);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}
.file-drop:hover { border-color: rgba(41, 224, 245, 0.5); color: var(--txt-2); background: rgba(41, 224, 245, 0.05); }
.file-drop svg { width: 22px; height: 22px; color: var(--cyan); margin: 0 auto 8px; }
.file-drop > [data-icon] { display: block; width: fit-content; margin: 0 auto; }
.file-name { color: #8fd8ec; font-size: 0.83rem; margin-top: 9px; word-break: break-all; }

/* ------------------------- 登录页 ------------------------- */

.auth-wrap { min-height: calc(100vh - var(--nav-h)); display: grid; place-items: center; padding: 48px 0 72px; }
.auth-card {
  width: 100%; max-width: 460px;
  border: 1px solid var(--line-2);
  border-radius: var(--radius-lg);
  padding: 34px 32px 30px;
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02));
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}
.auth-card h1 { font-size: 1.5rem; margin-bottom: 8px; }
.auth-card > p.lead { font-size: 0.92rem; margin-bottom: 24px; }

.auth-tabs { display: flex; gap: 4px; padding: 4px; border-radius: 11px; background: rgba(0, 0, 0, 0.32); border: 1px solid var(--line); margin-bottom: 24px; }
.auth-tab {
  flex: 1; padding: 10px 6px; border: 0; border-radius: 8px; background: transparent;
  color: var(--txt-2); font-size: 0.9rem; font-weight: 600; transition: background 0.22s, color 0.22s;
}
.auth-tab.active { background: rgba(41, 224, 245, 0.15); color: #a9ecf9; }

.auth-panel { display: none; }
.auth-panel.active { display: block; animation: fadeUp 0.34s ease both; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.divider { display: flex; align-items: center; gap: 12px; color: var(--txt-3); font-size: 0.8rem; margin: 22px 0; }
.divider::before, .divider::after { content: ""; flex: 1; height: 1px; background: var(--line); }

.wechat-btn {
  width: 100%; min-height: 48px;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  border-radius: 11px; border: 1px solid rgba(53, 214, 164, 0.34);
  background: rgba(53, 214, 164, 0.1); color: #86e9c6;
  font-weight: 600; font-size: 0.94rem;
  transition: background 0.22s, border-color 0.22s, transform 0.2s;
}
.wechat-btn:hover { background: rgba(53, 214, 164, 0.18); border-color: rgba(53, 214, 164, 0.55); transform: translateY(-1px); }
.wechat-btn svg { width: 20px; height: 20px; }

.auth-note { color: var(--txt-3); font-size: 0.8rem; margin-top: 18px; line-height: 1.65; text-align: center; }

.alert {
  display: none;
  padding: 12px 14px;
  border-radius: 11px;
  font-size: 0.87rem;
  margin-bottom: 18px;
  border: 1px solid transparent;
  line-height: 1.6;
}
.alert.show { display: block; }
.alert-error { background: rgba(255, 95, 109, 0.1); border-color: rgba(255, 95, 109, 0.34); color: #ffb3ba; }
.alert-ok { background: rgba(53, 214, 164, 0.1); border-color: rgba(53, 214, 164, 0.34); color: #9aebcd; }
.alert-info { background: rgba(75, 123, 255, 0.12); border-color: rgba(75, 123, 255, 0.34); color: #c3d2ff; }

/* ------------------------- 个人中心 ------------------------- */

.account-head {
  display: flex; align-items: center; gap: 22px; flex-wrap: wrap;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.015));
}
.avatar-lg {
  width: 76px; height: 76px; border-radius: 50%;
  display: grid; place-items: center; overflow: hidden; flex: none;
  background: var(--grad); color: #04121c; font-size: 1.5rem; font-weight: 700;
  box-shadow: 0 0 0 4px rgba(41, 224, 245, 0.14);
}
.avatar-lg img { width: 100%; height: 100%; object-fit: cover; }
.account-head .who h1 { font-size: 1.35rem; margin-bottom: 5px; }
.account-head .who p { color: var(--txt-3); font-size: 0.88rem; }
.account-head .spacer { flex: 1; }

.account-cols { display: grid; grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr); gap: 22px; align-items: start; }
@media (max-width: 900px) { .account-cols { grid-template-columns: 1fr; } }

.msg-item {
  border: 1px solid var(--line);
  border-radius: 13px;
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.028);
  transition: border-color 0.24s, background 0.24s;
}
.msg-item:hover { border-color: var(--line-2); background: rgba(255, 255, 255, 0.05); }
.msg-top { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; margin-bottom: 10px; }
.msg-top b { font-size: 0.98rem; }
.msg-time { color: var(--txt-3); font-size: 0.8rem; }
.msg-body { color: var(--txt-2); font-size: 0.9rem; white-space: pre-wrap; word-break: break-word; }
.msg-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.msg-meta span {
  font-size: 0.76rem; color: #8fd8ec;
  padding: 3px 10px; border-radius: 999px;
  background: rgba(41, 224, 245, 0.08);
  border: 1px solid rgba(41, 224, 245, 0.18);
}

.empty {
  text-align: center; padding: 52px 20px;
  border: 1px dashed var(--line-2); border-radius: var(--radius);
  color: var(--txt-3); font-size: 0.92rem;
}
.empty svg { width: 34px; height: 34px; color: var(--line-2); margin: 0 auto 14px; }

.skeleton {
  height: 92px; border-radius: 14px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.04));
  background-size: 200% 100%;
  animation: shimmer 1.4s linear infinite;
}
@keyframes shimmer { to { background-position: -200% 0; } }

/* ------------------------- 页脚 ------------------------- */

.site-footer {
  margin-top: clamp(56px, 7vw, 96px);
  border-top: 1px solid var(--line);
  background: rgba(3, 6, 13, 0.72);
  padding: 56px 0 calc(30px + env(safe-area-inset-bottom));
}
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 34px; }
.footer-brand p { color: var(--txt-3); font-size: 0.88rem; margin-top: 16px; max-width: 320px; }
.footer-col h4 { font-size: 0.92rem; margin-bottom: 16px; color: var(--txt); }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.footer-col a, .footer-col li { color: var(--txt-3); font-size: 0.87rem; }
.footer-col a:hover { color: var(--cyan); }
.footer-bottom {
  margin-top: 42px; padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  color: var(--txt-3); font-size: 0.8rem;
}

/* ------------------------- 提示条 ------------------------- */

#toast-host {
  position: fixed; top: calc(var(--nav-h) + 16px); left: 50%; transform: translateX(-50%);
  z-index: 200; display: grid; gap: 10px; width: min(92vw, 420px);
  pointer-events: none;
}
.toast {
  padding: 13px 18px;
  border-radius: 12px;
  font-size: 0.89rem;
  border: 1px solid var(--line-2);
  background: rgba(9, 15, 28, 0.94);
  backdrop-filter: blur(12px);
  color: var(--txt);
  box-shadow: var(--shadow);
  animation: toastIn 0.3s cubic-bezier(0.22, 0.61, 0.36, 1) both;
  display: flex; gap: 10px; align-items: flex-start;
}
.toast svg { width: 18px; height: 18px; flex: none; margin-top: 2px; }
.toast.ok { border-color: rgba(53, 214, 164, 0.42); }
.toast.ok svg { color: var(--ok); }
.toast.err { border-color: rgba(255, 95, 109, 0.42); }
.toast.err svg { color: var(--danger); }
.toast.info svg { color: var(--cyan); }
.toast.leaving { animation: toastOut 0.26s ease forwards; }
@keyframes toastIn { from { opacity: 0; transform: translateY(-12px); } to { opacity: 1; transform: none; } }
@keyframes toastOut { to { opacity: 0; transform: translateY(-12px); } }

/* ------------------------- 滚动出现 ------------------------- */

.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.7s cubic-bezier(0.22, 0.61, 0.36, 1), transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1); }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .orbit, .pulse-ring, .float-slow { animation: none !important; }
  html { scroll-behavior: auto; }
}

/* ------------------------- 工具栏 ------------------------- */

.mt-0 { margin-top: 0; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-40 { margin-top: 40px; }
.center { text-align: center; }
.muted { color: var(--txt-3); font-size: 0.85rem; }
.hidden { display: none !important; }

/* ------------------------- 响应式 ------------------------- */

@media (max-width: 1080px) {
  .g-5 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .industry-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-grid .footer-col:last-child { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .nucleus { width: min(78%, 360px); }
  .g-4, .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .step::after { display: none; }
}

@media (max-width: 768px) {
  .container { padding: 0 18px; }
  .nav-toggle { display: grid; }
  .nav-links {
    position: fixed; inset: var(--nav-h) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 4px;
    padding: 16px 18px 22px;
    background: rgba(5, 9, 18, 0.97);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
    transform: translateY(-8px);
    opacity: 0; pointer-events: none;
    transition: opacity 0.24s, transform 0.24s;
  }
  .nav-links.open { opacity: 1; transform: none; pointer-events: auto; }
  .nav-links a { padding: 14px 12px; font-size: 1rem; border-radius: 11px; }
  .nav-actions .btn-contact { display: none; }

  .stats-band { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .g-2, .g-3, .g-4, .g-5 { grid-template-columns: 1fr; }
  .industry-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .field-row { grid-template-columns: 1fr; gap: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid .footer-brand { grid-column: 1 / -1; }
  .cta-band { flex-direction: column; align-items: flex-start; }
  .auth-card { padding: 28px 22px 24px; }
  .account-head { padding: 22px; }
}

@media (max-width: 520px) {
  .stats-band { grid-template-columns: 1fr; }
  .industry-grid { grid-template-columns: 1fr; }
  .hero-actions .btn, .cta-actions .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .code-row { grid-template-columns: 1fr; }
  .tabs, .auth-tabs { width: 100%; }
}