/* ============================================
   星火俱乐部 · 官网样式
   风格：简约大气 · 暖橙点缀 · 大留白
   ============================================ */

:root {
  --primary: #ff5a2d;        /* 星火橙 */
  --primary-dark: #e0441c;
  --primary-light: #fff1ec;
  --ink: #1c1e21;            /* 主文字 */
  --ink-soft: #5a5f66;       /* 次级文字 */
  --line: #e8e6e2;           /* 分割线 */
  --bg: #ffffff;
  --bg-soft: #faf9f7;
  --radius: 14px;
  --shadow: 0 8px 30px rgba(28, 30, 33, 0.07);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ---------- 通用区块 ---------- */
.section { padding: 96px 0; }
.section.soft { background: var(--bg-soft); }

.section-head { text-align: center; max-width: 640px; margin: 0 auto 56px; }
.section-head .eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 4px;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 14px;
}
.section-head h2 { font-size: 34px; font-weight: 700; letter-spacing: 1px; }
.section-head p { color: var(--ink-soft); margin-top: 16px; font-size: 16px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 34px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  border: none;
  font-family: inherit;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 24px rgba(255, 90, 45, 0.32); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--line); }
.btn-ghost:hover { border-color: var(--ink); }

/* ---------- 导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; letter-spacing: 1px; }
.logo .spark {
  width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), #ff8f4d);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 17px;
  box-shadow: 0 4px 12px rgba(255, 90, 45, 0.35);
}
.nav-links { display: flex; gap: 36px; }
.nav-links a { font-size: 15px; color: var(--ink-soft); font-weight: 500; transition: color 0.2s; position: relative; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.nav-links a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -6px;
  height: 2px; background: var(--primary); border-radius: 2px;
}
.nav-cta { padding: 10px 24px; }

@media (max-width: 720px) {
  .nav-links { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 900px 500px at 85% -10%, rgba(255, 143, 77, 0.14), transparent 60%),
    radial-gradient(ellipse 700px 400px at 5% 110%, rgba(255, 90, 45, 0.08), transparent 60%),
    var(--bg);
  padding: 120px 0 110px;
}
.hero-inner { display: flex; align-items: center; gap: 60px; }
.hero-copy { flex: 1.15; }
.hero-copy .tag {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 13px; font-weight: 600;
  padding: 6px 16px; border-radius: 999px;
  margin-bottom: 26px;
}
.hero-copy h1 { font-size: 52px; line-height: 1.25; font-weight: 800; letter-spacing: 1px; }
.hero-copy h1 em { font-style: normal; color: var(--primary); }
.hero-copy .sub { font-size: 18px; color: var(--ink-soft); margin: 24px 0 40px; max-width: 520px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-stats { display: flex; gap: 48px; margin-top: 56px; }
.hero-stats .num { font-size: 30px; font-weight: 800; color: var(--primary); }
.hero-stats .num span { font-size: 16px; }
.hero-stats .label { font-size: 13px; color: var(--ink-soft); }

.hero-visual { flex: 0.85; position: relative; }
.hero-card {
  background: #fff; border-radius: 24px; padding: 36px 32px;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}
.hero-card .hc-title { font-size: 15px; font-weight: 700; margin-bottom: 22px; display: flex; align-items: center; gap: 8px; }
.hero-card .hc-title::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--primary); }
.flow-item {
  display: flex; align-items: center; gap: 14px;
  padding: 13px 16px; border-radius: 12px;
  background: var(--bg-soft); margin-bottom: 12px;
  font-size: 14.5px; font-weight: 500;
}
.flow-item:last-child { margin-bottom: 0; }
.flow-item .fi-icon {
  width: 34px; height: 34px; border-radius: 10px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
}
.fi-1 { background: #fff1ec; } .fi-2 { background: #eef4ff; } .fi-3 { background: #f0f9ef; } .fi-4 { background: #f6efff; }
.flow-item .fi-arrow { margin-left: auto; color: var(--line); font-size: 15px; }

@media (max-width: 880px) {
  .hero-inner { flex-direction: column; }
  .hero-copy h1 { font-size: 38px; }
}

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 960px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 880px) { .grid-3 { grid-template-columns: 1fr; } }
@media (max-width: 560px) { .grid-4 { grid-template-columns: 1fr; } }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 28px;
  transition: all 0.3s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.card .icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; margin-bottom: 22px;
  background: var(--primary-light);
}
.card h3 { font-size: 19px; font-weight: 700; margin-bottom: 12px; }
.card p { font-size: 14.5px; color: var(--ink-soft); }
.card .more { display: inline-block; margin-top: 18px; font-size: 14px; font-weight: 600; color: var(--primary); }

/* ---------- 服务页列表 ---------- */
.service-row {
  display: flex; gap: 56px; align-items: center;
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
}
.service-row:last-child { border-bottom: none; }
.service-row .num {
  font-size: 15px; font-weight: 800; color: var(--primary);
  letter-spacing: 2px; margin-bottom: 10px;
}
.service-row .content { flex: 1; }
.service-row .content h3 { font-size: 26px; font-weight: 800; margin-bottom: 14px; }
.service-row .content p { color: var(--ink-soft); font-size: 15.5px; max-width: 560px; }
.service-row .points { margin-top: 22px; display: grid; grid-template-columns: 1fr 1fr; gap: 10px 28px; }
.service-row .points li { font-size: 14.5px; color: var(--ink-soft); display: flex; gap: 10px; align-items: flex-start; }
.service-row .points li::before {
  content: "✦"; color: var(--primary); font-size: 12px; margin-top: 4px; flex-shrink: 0;
}
.service-visual {
  flex: 0 0 300px; height: 220px; border-radius: 20px;
  display: flex; align-items: center; justify-content: center;
  font-size: 72px;
  border: 1px solid var(--line);
}
@media (max-width: 880px) {
  .service-row { flex-direction: column; align-items: flex-start; }
  .service-row .points { grid-template-columns: 1fr; }
}

/* ---------- 闭环流程 ---------- */
.loop { display: flex; align-items: center; justify-content: center; gap: 0; flex-wrap: wrap; }
.loop-node {
  background: #fff; border: 1px solid var(--line); border-radius: 16px;
  padding: 26px 30px; text-align: center; min-width: 180px;
  box-shadow: 0 4px 16px rgba(28,30,33,0.05);
}
.loop-node .ln-icon { font-size: 32px; margin-bottom: 10px; }
.loop-node h4 { font-size: 17px; font-weight: 700; }
.loop-node p { font-size: 12.5px; color: var(--ink-soft); margin-top: 6px; }
.loop-arrow { font-size: 22px; color: var(--primary); padding: 0 18px; }
@media (max-width: 880px) {
  .loop-arrow { transform: rotate(90deg); padding: 14px 0; }
}

/* ---------- CTA 横幅 ---------- */
.cta-banner {
  background: linear-gradient(120deg, #1c1e21, #3a2620);
  border-radius: 24px;
  padding: 64px 56px;
  display: flex; align-items: center; justify-content: space-between; gap: 40px;
  flex-wrap: wrap;
}
.cta-banner h2 { color: #fff; font-size: 30px; font-weight: 800; }
.cta-banner p { color: rgba(255,255,255,0.65); margin-top: 12px; font-size: 15.5px; }

/* ---------- 页头（子页面） ---------- */
.page-hero {
  background:
    radial-gradient(ellipse 700px 360px at 80% -20%, rgba(255, 143, 77, 0.15), transparent 60%),
    var(--bg-soft);
  border-bottom: 1px solid var(--line);
  padding: 88px 0 72px;
  text-align: center;
}
.page-hero .eyebrow { font-size: 13px; letter-spacing: 4px; color: var(--primary); font-weight: 600; }
.page-hero h1 { font-size: 40px; font-weight: 800; margin: 14px 0 16px; letter-spacing: 1px; }
.page-hero p { color: var(--ink-soft); max-width: 560px; margin: 0 auto; font-size: 16px; }

/* ---------- 关于页 ---------- */
.about-grid { display: flex; gap: 64px; align-items: flex-start; }
.about-copy { flex: 1.2; }
.about-copy h3 { font-size: 24px; font-weight: 800; margin-bottom: 16px; }
.about-copy p { color: var(--ink-soft); margin-bottom: 16px; font-size: 15.5px; }
.value-list { flex: 1; display: grid; gap: 18px; }
.value-item {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 26px; display: flex; gap: 18px; align-items: flex-start;
}
.value-item .vi-icon {
  width: 44px; height: 44px; border-radius: 12px; flex-shrink: 0;
  background: var(--primary-light);
  display: flex; align-items: center; justify-content: center; font-size: 20px;
}
.value-item h4 { font-size: 16.5px; font-weight: 700; }
.value-item p { font-size: 14px; color: var(--ink-soft); margin-top: 4px; }

@media (max-width: 880px) { .about-grid { flex-direction: column; } }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; }
@media (max-width: 880px) { .contact-grid { grid-template-columns: 1fr; } }

.contact-info .ci-item {
  display: flex; gap: 18px; align-items: flex-start;
  padding: 24px 0; border-bottom: 1px solid var(--line);
}
.contact-info .ci-item:last-child { border-bottom: none; }
.ci-icon {
  width: 46px; height: 46px; border-radius: 12px; flex-shrink: 0;
  background: var(--primary-light);
  display: flex; align-items: center; justify-content: center; font-size: 20px;
}
.ci-item h4 { font-size: 16px; font-weight: 700; }
.ci-item p { font-size: 14.5px; color: var(--ink-soft); margin-top: 4px; }

.contact-form {
  background: #fff; border: 1px solid var(--line); border-radius: 20px;
  padding: 40px; box-shadow: var(--shadow);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 13.5px; font-weight: 600; margin-bottom: 8px; }
.field input, .field select, .field textarea {
  width: 100%; padding: 13px 16px; border: 1.5px solid var(--line);
  border-radius: 10px; font-size: 14.5px; font-family: inherit;
  background: var(--bg-soft); transition: border-color 0.2s, background 0.2s;
  color: var(--ink);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--primary); background: #fff;
}
.field textarea { resize: vertical; min-height: 120px; }

/* ---------- 页脚 ---------- */
.footer { background: #17181a; color: rgba(255,255,255,0.6); padding: 72px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 48px; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,0.1); }
@media (max-width: 880px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer .logo { color: #fff; margin-bottom: 18px; }
.footer p { font-size: 14px; line-height: 1.8; }
.footer h5 { color: #fff; font-size: 15px; margin-bottom: 20px; font-weight: 700; }
.footer li { margin-bottom: 12px; font-size: 14px; }
.footer li a:hover { color: var(--primary); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 28px; font-size: 13px; flex-wrap: wrap; gap: 10px;
}
.footer-bottom .dot { color: var(--primary); }

/* ---------- 动画 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: all 0.7s cubic-bezier(0.22, 1, 0.36, 1); }
.reveal.visible { opacity: 1; transform: none; }