/* =========================================================================
   全球质量管理顶尖技术交流公益组织 —— 网站样式
   设计语言：专业、可信、清晰；蓝(质量/信任) + 青(技术/活力) 双主色
   ========================================================================= */

:root {
  --primary: #134e9c;
  --primary-dark: #0a2f6e;
  --primary-soft: #e8f0fb;
  --accent: #00a99d;
  --accent-soft: #e2f6f4;
  --amber: #f5a623;
  --bg: #f5f8fc;
  --surface: #ffffff;
  --text: #1f2a37;
  --muted: #5b6b7e;
  --border: #e3e9f2;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 6px 22px rgba(19, 78, 156, 0.10);
  --shadow-lg: 0 14px 40px rgba(19, 78, 156, 0.16);
  --maxw: 1180px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

/* ---------- 顶部导航 ---------- */
#site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand { display: flex; align-items: center; gap: 11px; }
.brand .logo { width: 38px; height: 38px; flex: none; }
.brand .name { font-weight: 700; font-size: 16px; line-height: 1.2; color: var(--primary-dark); }
.brand .name small { display: block; font-weight: 500; font-size: 11px; color: var(--muted); letter-spacing: .3px; }
.nav-links { display: flex; gap: 4px; list-style: none; }
.nav-links a {
  display: block; padding: 9px 15px; border-radius: 9px;
  color: var(--muted); font-weight: 600; font-size: 14.5px;
}
.nav-links a:hover { background: var(--primary-soft); color: var(--primary); text-decoration: none; }
.nav-links a.active { background: var(--primary); color: #fff; }
.nav-toggle { display: none; background: none; border: 0; font-size: 24px; cursor: pointer; color: var(--primary); }

/* ---------- 通用区块 ---------- */
section { padding: 64px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 40px; }
.section-head .eyebrow {
  display: inline-block; color: var(--accent); font-weight: 700;
  letter-spacing: 2px; font-size: 12.5px; text-transform: uppercase; margin-bottom: 10px;
}
.section-head h2 { font-size: 30px; color: var(--primary-dark); margin-bottom: 12px; letter-spacing: .5px; }
.section-head p { color: var(--muted); font-size: 15.5px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 55%, #1b6fb0 100%);
  color: #fff;
}
.hero::after {
  content: ""; position: absolute; right: -120px; top: -120px;
  width: 460px; height: 460px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,169,157,.35), transparent 70%);
}
.hero-inner { position: relative; z-index: 2; padding: 92px 0 100px; max-width: 760px; }
.hero .badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.25);
  padding: 6px 14px; border-radius: 999px; font-size: 13px; margin-bottom: 22px;
}
.hero h1 { font-size: 41px; line-height: 1.25; margin-bottom: 18px; letter-spacing: .5px; }
.hero h1 .hl { color: var(--amber); }
.hero p.lead { font-size: 17.5px; color: #dce8f6; margin-bottom: 30px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 24px; border-radius: 10px; font-weight: 700; font-size: 15px;
  cursor: pointer; border: 0; transition: transform .15s, box-shadow .15s;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn-primary { background: var(--amber); color: #2a1c00; }
.btn-ghost { background: rgba(255,255,255,.12); color: #fff; border: 1px solid rgba(255,255,255,.4); }
.btn-outline { background: #fff; color: var(--primary); box-shadow: var(--shadow); }

/* ---------- 统计带 ---------- */
.stats-band { background: var(--surface); border-bottom: 1px solid var(--border); }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; padding: 30px 0; }
.stat { text-align: center; padding: 8px; }
.stat .num { font-size: 38px; font-weight: 800; color: var(--primary); line-height: 1; }
.stat .num span { color: var(--accent); }
.stat .label { color: var(--muted); font-size: 14px; margin-top: 8px; }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow);
  transition: transform .18s, box-shadow .18s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.feature .ico {
  width: 50px; height: 50px; border-radius: 12px; display: grid; place-items: center;
  background: var(--primary-soft); color: var(--primary); margin-bottom: 16px; font-size: 24px;
}
.feature h3 { font-size: 18.5px; margin-bottom: 9px; color: var(--primary-dark); }
.feature p { color: var(--muted); font-size: 14.5px; }

/* ---------- 工具矩阵 ---------- */
.tool-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.tool {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; text-align: center; cursor: pointer; transition: .18s; box-shadow: var(--shadow);
}
.tool:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: var(--shadow-lg); }
.tool .t-ico {
  width: 54px; height: 54px; margin: 0 auto 14px; border-radius: 14px;
  display: grid; place-items: center; font-size: 26px; color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--accent));
}
.tool h4 { font-size: 16.5px; color: var(--primary-dark); margin-bottom: 6px; }
.tool p { font-size: 13px; color: var(--muted); }
.tool .count { display: inline-block; margin-top: 10px; font-size: 12px; color: var(--accent); font-weight: 700; }

/* ---------- 权威来源 ---------- */
.sources { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.source-chip {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 20px; font-weight: 700; color: var(--muted); font-size: 14px; box-shadow: var(--shadow);
}

/* ---------- 列表 / 筛选 ---------- */
.toolbar { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-bottom: 26px; }
.search {
  flex: 1; min-width: 240px; display: flex; align-items: center; gap: 8px;
  background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 10px 14px;
}
.search input { border: 0; outline: 0; flex: 1; font-size: 14.5px; color: var(--text); background: transparent; }
.search svg { color: var(--muted); flex: none; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  border: 1px solid var(--border); background: #fff; color: var(--muted);
  padding: 8px 15px; border-radius: 999px; font-size: 13.5px; font-weight: 600; cursor: pointer;
  transition: .15s;
}
.chip:hover { border-color: var(--primary); color: var(--primary); }
.chip.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ---------- 标准卡片 ---------- */
.std {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 12px;
  transition: .18s;
}
.std:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.std .meta { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.tag {
  font-size: 11.5px; font-weight: 700; padding: 3px 10px; border-radius: 999px;
  background: var(--primary-soft); color: var(--primary);
}
.tag.region { background: var(--accent-soft); color: #007a72; }
.tag.auto { background: #fff3df; color: #b9770a; }
.tag.tool { background: #eaf6ee; color: #1f8a4c; }
.std h3 { font-size: 17px; color: var(--primary-dark); line-height: 1.4; }
.std p { color: var(--muted); font-size: 14px; flex: 1; }
.std .foot { display: flex; justify-content: space-between; align-items: center; font-size: 12.5px; color: var(--muted); }
.std .foot a { font-weight: 700; }

/* ---------- 案例卡片 ---------- */
.case {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow); cursor: pointer; transition: .18s;
  display: flex; flex-direction: column; gap: 12px;
}
.case:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); border-color: var(--accent); }
.case h3 { font-size: 17px; color: var(--primary-dark); line-height: 1.4; }
.case .ind { font-size: 12.5px; color: var(--muted); }
.case p { color: var(--muted); font-size: 14px; flex: 1; }
.case .tags { display: flex; flex-wrap: wrap; gap: 6px; }
.case .more { font-size: 13px; font-weight: 700; color: var(--accent); }

/* ---------- 弹窗 ---------- */
.modal-mask {
  position: fixed; inset: 0; background: rgba(10, 30, 60, .55);
  display: none; align-items: flex-start; justify-content: center; z-index: 100;
  padding: 50px 18px; overflow-y: auto;
}
.modal-mask.open { display: flex; }
.modal {
  background: #fff; border-radius: 16px; max-width: 720px; width: 100%;
  padding: 32px; box-shadow: var(--shadow-lg); position: relative;
}
.modal .close {
  position: absolute; right: 18px; top: 16px; border: 0; background: var(--bg);
  width: 34px; height: 34px; border-radius: 50%; font-size: 19px; cursor: pointer; color: var(--muted);
}
.modal h2 { font-size: 23px; color: var(--primary-dark); margin-bottom: 8px; padding-right: 40px; }
.modal .sub { color: var(--muted); font-size: 13.5px; margin-bottom: 18px; }
.modal .block { margin-bottom: 18px; }
.modal .block h4 { font-size: 14px; color: var(--accent); margin-bottom: 6px; letter-spacing: .5px; }
.modal .block p { color: var(--text); font-size: 14.5px; }
.modal .res { background: var(--accent-soft); border-left: 4px solid var(--accent); padding: 14px 16px; border-radius: 8px; }
.modal .res p { color: #06544e; font-weight: 600; }

/* ---------- 关于页 ---------- */
.principle-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.principle { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 18px; box-shadow: var(--shadow); }
.principle b { color: var(--primary); display: block; margin-bottom: 4px; font-size: 15px; }
.principle span { font-size: 13.5px; color: var(--muted); }

/* 流程图 */
.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; align-items: stretch; margin: 10px 0 6px; }
.flow .step {
  background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 18px 12px;
  text-align: center; box-shadow: var(--shadow); position: relative;
}
.flow .step .n {
  width: 30px; height: 30px; border-radius: 50%; background: var(--primary); color: #fff;
  display: grid; place-items: center; margin: 0 auto 10px; font-weight: 800; font-size: 14px;
}
.flow .step h5 { font-size: 14px; color: var(--primary-dark); margin-bottom: 4px; }
.flow .step p { font-size: 12px; color: var(--muted); }
.flow .arrow { display: grid; place-items: center; color: var(--accent); font-size: 22px; }

/* ---------- 代码块 ---------- */
.code {
  background: #0d1b2e; color: #cfe3ff; border-radius: 12px; padding: 18px 20px;
  font-family: "Cascadia Code", "Consolas", monospace; font-size: 13.5px;
  overflow-x: auto; line-height: 1.7;
}
.code .c { color: #6c8bbf; }
.code .k { color: #ffd479; }

/* ---------- CTA 带 ---------- */
.cta {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; border-radius: 18px; padding: 48px; text-align: center;
}
.cta h2 { font-size: 28px; margin-bottom: 12px; }
.cta p { color: #eafdfb; margin-bottom: 22px; font-size: 15.5px; }

/* ---------- 页脚 ---------- */
#site-footer { background: var(--primary-dark); color: #c5d6ee; margin-top: 40px; }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 30px; padding: 50px 0 30px; }
.foot-grid h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.foot-grid a { color: #c5d6ee; display: block; font-size: 14px; margin-bottom: 8px; }
.foot-grid a:hover { color: #fff; }
.foot-grid p { font-size: 13.5px; color: #9fb6d6; }
.foot-bottom { border-top: 1px solid rgba(255,255,255,.12); padding: 18px 0; font-size: 12.5px; color: #8aa3c4; text-align: center; }

/* ---------- 会员 / 语言切换 ---------- */
.nav-right { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.lang-switch {
  border: 1px solid var(--border); background: #fff; border-radius: 8px;
  padding: 7px 12px; cursor: pointer; font-weight: 700; color: var(--primary); font-size: 13.5px;
}
.lang-switch:hover { border-color: var(--primary); }
.member-menu { display: flex; align-items: center; gap: 8px; }
.member-menu .welcome { font-size: 13.5px; color: var(--muted); font-weight: 600; }
.nav-login {
  padding: 8px 15px; border-radius: 8px; border: 1px solid var(--primary);
  background: #fff; color: var(--primary); font-weight: 700; cursor: pointer; font-size: 13.5px;
}
.nav-login:hover { background: var(--primary-soft); }
.nav-login.primary { background: var(--primary); color: #fff; }
.nav-login.primary:hover { background: var(--primary-dark); }

/* 认证 / 上传表单（弹窗内） */
.auth-form { display: flex; flex-direction: column; gap: 14px; margin-top: 6px; }
.auth-form label { display: flex; flex-direction: column; gap: 6px; font-size: 13.5px; font-weight: 600; color: var(--primary-dark); }
.auth-form input, .auth-form select, .auth-form textarea {
  border: 1px solid var(--border); border-radius: 9px; padding: 10px 12px; font-size: 14px;
  font-family: inherit; color: var(--text); outline: none; background: #fff;
}
.auth-form input:focus, .auth-form select:focus, .auth-form textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.auth-msg { color: #c0392b; font-size: 13.5px; min-height: 18px; font-weight: 600; }
.auth-switch { text-align: center; font-size: 13.5px; color: var(--muted); margin-top: 4px; }

/* 资料卡片 */
.res-card { gap: 10px !important; }
.res-card .res-foot { font-size: 12.5px; color: var(--muted); }
.res-card .res-actions { display: flex; gap: 10px; align-items: center; margin-top: 4px; flex-wrap: wrap; }
.res-del {
  border: 1px solid #f0c5c0; background: #fff; color: #c0392b; border-radius: 8px;
  padding: 7px 13px; font-size: 13px; font-weight: 700; cursor: pointer;
}
.res-del:hover { background: #fdecea; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .tool-grid { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .principle-grid { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .flow .arrow { transform: rotate(90deg); }
  .nav-links {
    position: absolute; top: 66px; left: 0; right: 0; background: #fff;
    flex-direction: column; padding: 10px 22px; border-bottom: 1px solid var(--border);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .foot-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 31px; }
}