:root {
  --color-primary: #14366b;
  --color-primary-dark: #0d2347;
  --color-primary-light: #1e4d8c;
  --color-accent: #f26522;
  --color-accent-dark: #d9531a;
  --color-bg: #ffffff;
  --color-bg-soft: #f5f7fa;
  --color-bg-dark: #0d2347;
  --color-text: #1f2937;
  --color-text-muted: #6b7280;
  --color-border: #e5e7eb;
  --color-success: #16a34a;
  --color-danger: #dc2626;
  --shadow-sm: 0 1px 3px rgba(16, 35, 71, 0.08);
  --shadow-md: 0 8px 24px rgba(16, 35, 71, 0.10);
  --shadow-lg: 0 16px 48px rgba(16, 35, 71, 0.14);
  --radius: 12px;
  --radius-sm: 8px;
  --maxw: 1180px;
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all .2s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--color-accent); color: #fff; box-shadow: 0 6px 18px rgba(242,101,34,.28); }
.btn-primary:hover { background: var(--color-accent-dark); transform: translateY(-1px); }
.btn-outline { background: transparent; color: var(--color-primary); border-color: var(--color-primary); }
.btn-outline:hover { background: var(--color-primary); color: #fff; }
.btn-light { background: #fff; color: var(--color-primary); }
.btn-light:hover { background: #eef2f8; }
.btn-ghost { background: transparent; color: var(--color-text); border-color: var(--color-border); }
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn-block { width: 100%; }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; color: var(--color-primary); }
.brand .logo-mark {
  width: 36px; height: 36px; border-radius: 9px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff; display: grid; place-items: center; font-size: 18px; font-weight: 800;
}
.brand .logo-img {
  width: 40px; height: 40px; border-radius: 9px; object-fit: cover;
  box-shadow: var(--shadow-sm); flex: none;
}
.brand small { display: block; font-size: 11px; font-weight: 500; color: var(--color-text-muted); letter-spacing: .5px; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 8px 16px; border-radius: 8px; font-weight: 500; color: var(--color-text);
  transition: all .15s ease;
}
.nav-links a:hover { color: var(--color-primary); background: var(--color-bg-soft); }
.nav-links a.active { color: var(--color-primary); background: #eef2f8; font-weight: 600; }

.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--color-primary); }

.user-chip { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.user-chip .avatar {
  width: 34px; height: 34px; border-radius: 50%; object-fit: cover;
  background: var(--color-primary); color: #fff; display: grid; place-items: center; font-weight: 700;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background: radial-gradient(1200px 600px at 80% -10%, rgba(242,101,34,.18), transparent 60%),
              linear-gradient(135deg, var(--color-primary-dark), var(--color-primary) 60%, var(--color-primary-light));
  color: #fff;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.08) 1px, transparent 1px);
  background-size: 26px 26px;
  opacity: .5;
}
.hero-inner { position: relative; padding: 92px 0 100px; }
.hero .eyebrow {
  display: inline-block; padding: 6px 14px; border-radius: 999px;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.22);
  font-size: 13px; letter-spacing: 1px; margin-bottom: 22px;
}
.hero h1 { font-size: 46px; line-height: 1.2; font-weight: 800; letter-spacing: -0.5px; }
.hero h1 .hl { color: #ffb38a; }
.hero p.lead { font-size: 18px; line-height: 1.8; max-width: 620px; margin: 22px 0 34px; color: rgba(255,255,255,.86); }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 44px; margin-top: 56px; flex-wrap: wrap; }
.hero-stats .stat .num { font-size: 32px; font-weight: 800; }
.hero-stats .stat .label { font-size: 14px; color: rgba(255,255,255,.72); }

/* ---------- Sections ---------- */
.section { padding: 84px 0; }
.section.soft { background: var(--color-bg-soft); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 52px; }
.section-head .kicker { color: var(--color-accent); font-weight: 700; font-size: 14px; letter-spacing: 2px; text-transform: uppercase; }
.section-head h2 { font-size: 34px; font-weight: 800; margin: 12px 0 14px; color: var(--color-primary-dark); }
.section-head p { color: var(--color-text-muted); font-size: 16px; }

/* ---------- Grid / Cards ---------- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius);
  padding: 30px; transition: all .2s ease; height: 100%;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); border-color: transparent; }
.card .icon {
  width: 50px; height: 50px; border-radius: 12px; display: grid; place-items: center;
  background: linear-gradient(135deg, #eef2f8, #e3ecf8); color: var(--color-primary);
  font-size: 24px; margin-bottom: 18px;
}
.card h3 { font-size: 19px; margin-bottom: 10px; color: var(--color-primary-dark); }
.card p { color: var(--color-text-muted); font-size: 15px; }

.feature-list { list-style: none; margin-top: 14px; }
.feature-list li { position: relative; padding-left: 26px; margin-bottom: 10px; color: var(--color-text); font-size: 15px; }
.feature-list li::before {
  content: "✓"; position: absolute; left: 0; top: 0; width: 18px; height: 18px;
  background: rgba(242,101,34,.12); color: var(--color-accent); border-radius: 50%;
  display: grid; place-items: center; font-size: 11px; font-weight: 700;
}

/* ---------- Products ---------- */
.product-card { display: flex; flex-direction: column; }
.product-card .tag { align-self: flex-start; background: #fff1e8; color: var(--color-accent); font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 999px; margin-bottom: 14px; }
.product-card h3 { font-size: 21px; }
.product-card .desc { color: var(--color-text-muted); font-size: 14px; margin-bottom: 16px; flex: 1; }
.product-card .meta { font-size: 13px; color: var(--color-text-muted); border-top: 1px dashed var(--color-border); padding-top: 14px; margin-top: 6px; }

/* ---------- Steps ---------- */
.steps { counter-reset: step; }
.step { position: relative; padding-left: 64px; margin-bottom: 30px; }
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: 0; width: 44px; height: 44px; border-radius: 50%;
  background: var(--color-primary); color: #fff; display: grid; place-items: center; font-weight: 800; font-size: 18px;
}
.step h4 { font-size: 17px; margin-bottom: 4px; color: var(--color-primary-dark); }
.step p { color: var(--color-text-muted); font-size: 14px; }

/* ---------- Tables / Industries ---------- */
.chip-row { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.chip { padding: 10px 20px; border-radius: 999px; background: #fff; border: 1px solid var(--color-border); font-weight: 600; color: var(--color-primary); }
.chip:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* ---------- Articles (DB-driven) ---------- */
.article-card { display: flex; flex-direction: column; overflow: hidden; padding: 0; }
.article-card .cover { height: 150px; background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light)); display: grid; place-items: center; color: rgba(255,255,255,.85); font-size: 13px; letter-spacing: 2px; }
.article-card .body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.article-card .cat { font-size: 12px; color: var(--color-accent); font-weight: 700; }
.article-card h4 { font-size: 17px; margin: 8px 0 8px; color: var(--color-primary-dark); line-height: 1.4; }
.article-card p { color: var(--color-text-muted); font-size: 14px; flex: 1; }
.article-card .date { font-size: 12px; color: var(--color-text-muted); margin-top: 12px; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; }
.info-item { display: flex; gap: 14px; margin-bottom: 22px; }
.info-item .ic { flex: none; width: 42px; height: 42px; border-radius: 10px; background: #eef2f8; color: var(--color-primary); display: grid; place-items: center; font-size: 20px; }
.info-item .t { font-weight: 700; color: var(--color-primary-dark); }
.info-item .d { color: var(--color-text-muted); font-size: 15px; }
.map-box { height: 200px; border-radius: var(--radius); background: linear-gradient(135deg,#e9eef6,#dde6f2); display: grid; place-items: center; color: var(--color-text-muted); margin-top: 14px; border: 1px solid var(--color-border); }

/* ---------- Forms ---------- */
.form-card { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow-sm); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 7px; color: var(--color-primary-dark); }
.form-group label .req { color: var(--color-accent); }
.form-control {
  width: 100%; padding: 11px 14px; border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  font-size: 15px; font-family: inherit; color: var(--color-text); background: #fff; transition: border-color .15s;
}
.form-control:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(20,54,107,.10); }
textarea.form-control { resize: vertical; min-height: 110px; }
.form-hint { font-size: 13px; color: var(--color-text-muted); margin-top: 6px; }
.form-msg { padding: 12px 14px; border-radius: var(--radius-sm); font-size: 14px; margin-bottom: 16px; display: none; }
.form-msg.ok { display: block; background: #ecfdf3; color: #027a48; border: 1px solid #abefc6; }
.form-msg.err { display: block; background: #fef3f2; color: #b42318; border: 1px solid #fecdca; }

.file-drop { border: 1.5px dashed var(--color-border); border-radius: var(--radius-sm); padding: 18px; text-align: center; color: var(--color-text-muted); font-size: 14px; cursor: pointer; transition: all .15s; }
.file-drop:hover { border-color: var(--color-primary); color: var(--color-primary); }
.file-drop.has-file { border-style: solid; border-color: var(--color-success); color: var(--color-success); }

/* ---------- Auth ---------- */
.auth-wrap { min-height: calc(100vh - 68px); display: grid; grid-template-columns: 1fr 1fr; }
.auth-aside { background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary-light)); color: #fff; padding: 60px; display: flex; flex-direction: column; justify-content: center; }
.auth-aside h2 { font-size: 32px; margin-bottom: 16px; }
.auth-aside p { color: rgba(255,255,255,.82); }
.auth-aside ul { margin-top: 26px; list-style: none; }
.auth-aside li { padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.9); }
.auth-main { display: grid; place-items: center; padding: 40px; }
.auth-box { width: 100%; max-width: 380px; }
.auth-box h1 { font-size: 26px; color: var(--color-primary-dark); margin-bottom: 6px; }
.auth-box .sub { color: var(--color-text-muted); margin-bottom: 26px; }

.tabs { display: flex; gap: 8px; margin-bottom: 22px; background: var(--color-bg-soft); padding: 5px; border-radius: 999px; }
.tabs button { flex: 1; padding: 9px; border: none; background: transparent; border-radius: 999px; font-weight: 600; cursor: pointer; color: var(--color-text-muted); font-family: inherit; }
.tabs button.active { background: #fff; color: var(--color-primary); box-shadow: var(--shadow-sm); }

.divider { display: flex; align-items: center; gap: 12px; color: var(--color-text-muted); font-size: 13px; margin: 22px 0; }
.divider::before, .divider::after { content: ""; flex: 1; height: 1px; background: var(--color-border); }

.btn-wechat { background: #07c160; color: #fff; }
.btn-wechat:hover { background: #06ad56; }

.resend { font-size: 13px; }
.resend a { color: var(--color-primary); cursor: pointer; }
.resend.disabled { color: var(--color-text-muted); }

/* ---------- Member ---------- */
.member-hero { background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary)); color: #fff; padding: 44px 0; }
.member-hero .inner { display: flex; align-items: center; gap: 22px; }
.member-hero .avatar-big { width: 76px; height: 76px; border-radius: 50%; background: rgba(255,255,255,.16); display: grid; place-items: center; font-size: 30px; font-weight: 800; overflow: hidden; }
.member-hero .avatar-big img { width: 100%; height: 100%; object-fit: cover; }
.member-hero h2 { font-size: 24px; }
.member-hero p { color: rgba(255,255,255,.8); font-size: 14px; }

.inquiry-item { border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 18px 20px; margin-bottom: 14px; background: #fff; }
.inquiry-item .top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.inquiry-item .top h4 { font-size: 16px; color: var(--color-primary-dark); }
.inquiry-item .when { font-size: 12px; color: var(--color-text-muted); }
.inquiry-item .msg { color: var(--color-text); font-size: 15px; white-space: pre-wrap; }
.inquiry-item .file { margin-top: 8px; font-size: 13px; }
.inquiry-item .file a { color: var(--color-primary); text-decoration: underline; }
.badge { font-size: 12px; font-weight: 700; padding: 3px 10px; border-radius: 999px; background: #fff1e8; color: var(--color-accent); }

.empty { text-align: center; color: var(--color-text-muted); padding: 40px 0; }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-bg-dark); color: rgba(255,255,255,.78); padding: 56px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.3fr 1fr; gap: 32px; }
.site-footer h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
.site-footer a { color: rgba(255,255,255,.72); font-size: 14px; display: block; padding: 5px 0; }
.site-footer a:hover { color: #fff; }
.site-footer .brand { color: #fff; margin-bottom: 14px; }
.site-footer .about-text { font-size: 14px; color: rgba(255,255,255,.66); max-width: 320px; }
.qr-row { display: flex; gap: 14px; }
.qr-item { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.qr-item span { font-size: 12px; color: rgba(255,255,255,.72); }
.qr-box {
  width: 88px; height: 88px; border-radius: 8px; overflow: hidden;
  background: #fff; padding: 4px; box-shadow: var(--shadow-md);
}
.qr-box img { width: 100%; height: 100%; object-fit: contain; display: block; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 40px; padding-top: 20px; font-size: 13px; color: rgba(255,255,255,.55); text-align: center; }

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 36px; transform: translateX(-50%) translateY(20px);
  background: var(--color-primary-dark); color: #fff; padding: 12px 22px; border-radius: 999px;
  font-size: 14px; box-shadow: var(--shadow-lg); opacity: 0; pointer-events: none; transition: all .25s; z-index: 999;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 920px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .auth-wrap { grid-template-columns: 1fr; }
  .auth-aside { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  .nav-links { display: none; position: absolute; top: 68px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 14px 24px; border-bottom: 1px solid var(--color-border); box-shadow: var(--shadow-md); }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .nav-right .btn-outline { display: none; }
  .hero h1 { font-size: 32px; }
  .hero-stats { gap: 26px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .section-head h2 { font-size: 26px; }
}