/* roulang page: index */
:root {
  --primary: #3b7cad;
  --primary-dark: #2e6390;
  --primary-light: #4a8bb7;
  --accent: #c08a4e;
  --accent-dark: #a9743a;
  --bg: #eaf2f8;
  --bg-light: #f0f6fb;
  --card-bg: #ffffff;
  --text: #1f2a37;
  --text-body: #4b5563;
  --text-muted: #8a94a0;
  --border: #dce5ec;
  --success: #3e7a5e;
  --warning: #b98a5a;
  --radius-lg: 12px;
  --radius-md: 8px;
  --radius-sm: 6px;
  --radius-xs: 4px;
  --shadow-default: 0 1px 3px rgba(31,42,55,.08), 0 8px 24px rgba(31,42,55,.06);
  --shadow-hover: 0 12px 32px rgba(31,42,55,.12);
  --transition: 0.2s ease;
  --container-w: 1200px;
  --header-h: 64px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }

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

/* Header */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--header-h);
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.site-header.is-scrolled { box-shadow: var(--shadow-default); }
.nav {
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between;
  max-width: var(--container-w); margin: 0 auto; padding: 0 24px;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 18px; font-weight: 600; letter-spacing: .02em; color: var(--text);
}
.nav-logo-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent); display: inline-block; flex-shrink: 0;
}
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-link {
  font-size: 14px; color: var(--text-body);
  position: relative; padding: 6px 2px; transition: color var(--transition);
}
.nav-link:hover, .nav-link.active { color: var(--primary); }
.nav-link.active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -2px;
  height: 2px; background: var(--primary); border-radius: 2px;
}
.nav-cta {
  font-size: 13px; padding: 7px 18px;
  background: var(--primary); color: #fff; border-radius: var(--radius-sm);
  transition: background var(--transition), transform var(--transition);
}
.nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); }
.nav-cta:focus { outline: 2px solid var(--primary-light); outline-offset: 2px; }
.nav-cta:active { transform: translateY(0); }
.nav-toggle {
  display: none; background: none; border: none; flex-direction: column; gap: 5px;
  padding: 10px; border-radius: var(--radius-sm);
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--text); border-radius: 2px; transition: all .3s ease; }
.nav-toggle:hover span { background: var(--primary); }
.nav-toggle:focus { outline: 2px solid var(--primary-light); }

/* Hero */
.hero { position: relative; min-height: 540px; display: flex; flex-direction: column; justify-content: center; margin-top: var(--header-h); overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-1.jpg'); background-size: cover; background-position: center; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(234,242,248,.94) 0%, rgba(234,242,248,.82) 50%, rgba(240,246,251,.6) 100%); }
.hero-content { position: relative; z-index: 2; max-width: 800px; margin: 0 auto; text-align: center; padding: 100px 24px 60px; }
.hero-kicker {
  display: inline-block; font-size: 13px; color: var(--primary); letter-spacing: .12em;
  background: rgba(59,124,173,.1); padding: 4px 14px; border-radius: 20px; margin-bottom: 24px;
}
.hero h1 { font-size: 44px; line-height: 1.3; font-weight: 700; color: var(--text); letter-spacing: .01em; margin-bottom: 20px; }
.hero h1 .highlight { color: var(--accent); }
.hero-sub { font-size: 17px; color: var(--text-body); line-height: 1.8; max-width: 640px; margin: 0 auto 36px; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-strip {
  position: relative; z-index: 2;
  border-top: 1px solid rgba(220,229,236,.6);
  background: rgba(255,255,255,.5);
  backdrop-filter: blur(4px);
}
.hero-strip .container { display: flex; justify-content: center; align-items: center; gap: 40px; padding: 18px 24px; flex-wrap: wrap; }
.hero-strip span { font-size: 13px; color: var(--text-body); display: flex; align-items: center; gap: 8px; }
.hero-strip i {
  display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--accent);
}

/* Button */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 500; line-height: 1; padding: 13px 28px;
  border-radius: var(--radius-sm); border: 1px solid transparent;
  transition: all var(--transition); cursor: pointer; text-align: center;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 12px rgba(59,124,173,.25); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(59,124,173,.3); }
.btn-primary:focus { outline: 2px solid var(--primary-light); outline-offset: 2px; }
.btn-primary:active { transform: translateY(0); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: rgba(59,124,173,.06); border-color: var(--primary-dark); color: var(--primary-dark); transform: translateY(-2px); }
.btn-outline:focus { outline: 2px solid var(--primary-light); outline-offset: 2px; }
.btn-outline:active { transform: translateY(0); }
.btn-accent { background: var(--accent); color: #fff; box-shadow: 0 4px 12px rgba(192,138,78,.28); }
.btn-accent:hover { background: var(--accent-dark); transform: translateY(-2px); }
.btn-accent:focus { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn-accent:active { transform: translateY(0); }
.btn-block { width: 100%; }

/* Section */
.section { padding: 88px 0; }
.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-num {
  display: flex; align-items: center; gap: 12px; margin-bottom: 16px;
  font-size: 13px; font-weight: 600; color: var(--accent); letter-spacing: .1em;
}
.section-num::before { content: ''; width: 32px; height: 2px; background: var(--accent); border-radius: 2px; display: inline-block; }
.section-head.center .section-num { justify-content: center; }
.section-head.center .section-num::after { content: ''; width: 32px; height: 2px; background: var(--accent); border-radius: 2px; display: inline-block; }
.section-head h2 { font-size: 30px; line-height: 1.35; font-weight: 700; color: var(--text); margin-bottom: 12px; }
.section-head p { font-size: 15px; color: var(--text-muted); line-height: 1.7; }

/* Pain section */
.pain-section { background: var(--bg-light); }
.pain-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.pain-figure { position: relative; }
.pain-figure img { border-radius: var(--radius-lg); box-shadow: var(--shadow-default); object-fit: cover; width: 100%; height: 360px; }
.pain-figure::after {
  content: '？'; position: absolute; top: -24px; right: -16px;
  width: 72px; height: 72px; background: var(--accent); color: #fff;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 32px; font-weight: 700; box-shadow: 0 8px 20px rgba(192,138,78,.35);
}
.pain-list { display: flex; flex-direction: column; gap: 0; }
.pain-item { padding: 24px 0; border-bottom: 1px solid var(--border); display: flex; gap: 20px; align-items: flex-start; transition: background var(--transition); }
.pain-item:first-child { padding-top: 0; }
.pain-item:last-child { border-bottom: none; }
.pain-item .pain-icon {
  flex-shrink: 0; width: 40px; height: 40px; border-radius: 10px;
  background: rgba(192,138,78,.12); color: var(--accent);
  display: flex; align-items: center; justify-content: center; font-size: 16px;
}
.pain-item h3 { font-size: 17px; font-weight: 600; margin-bottom: 4px; color: var(--text); }
.pain-item p { font-size: 14px; color: var(--text-body); line-height: 1.6; }

/* Solution / Process */
.process-section { background: var(--bg); }
.process-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; }
.process-figure img { border-radius: var(--radius-lg); box-shadow: var(--shadow-default); object-fit: cover; width: 100%; height: 400px; }
.process-steps { display: flex; flex-direction: column; }
.process-step { display: flex; gap: 24px; padding: 28px 0; border-bottom: 1px solid var(--border); transition: background var(--transition); }
.process-step:first-child { padding-top: 0; }
.process-step:last-child { border-bottom: none; }
.step-num {
  font-size: 28px; font-weight: 700; color: var(--primary); line-height: 1;
  font-variant-numeric: tabular-nums; min-width: 44px;
}
.step-body h3 { font-size: 18px; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.step-body p { font-size: 14px; color: var(--text-body); line-height: 1.65; }
.step-tag {
  display: inline-block; margin-top: 8px; font-size: 12px;
  background: rgba(59,124,173,.1); color: var(--primary);
  padding: 2px 10px; border-radius: 20px;
}

/* Plan / Compare */
.plan-section { background: var(--bg-light); }
.section-num-2 { color: var(--primary); }
.section-num-2::before, .section-num-2::after { background: var(--primary); }
.plan-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 28px; }
.plan-card {
  background: var(--card-bg); border-radius: var(--radius-lg); border: 1px solid var(--border);
  padding: 36px 28px; box-shadow: var(--shadow-default); transition: all var(--transition); position: relative;
}
.plan-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.plan-card.featured { border: 1px solid var(--primary); box-shadow: 0 8px 30px rgba(59,124,173,.15); }
.plan-card.featured .plan-flag {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--primary); color: #fff; font-size: 12px; font-weight: 600;
  padding: 3px 14px; border-radius: 20px; white-space: nowrap;
}
.plan-name { font-size: 18px; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.plan-desc { font-size: 13px; color: var(--text-muted); margin-bottom: 20px; }
.plan-price { font-size: 30px; font-weight: 700; color: var(--text); margin-bottom: 20px; }
.plan-price small { font-size: 14px; font-weight: 400; color: var(--text-muted); }
.plan-features { display: flex; flex-direction: column; gap: 12px; margin-bottom: 28px; }
.plan-features li { display: flex; gap: 10px; font-size: 14px; color: var(--text-body); align-items: flex-start; }
.plan-features li i { color: var(--accent); font-style: normal; flex-shrink: 0; }

/* Stats / Guarantee */
.stats-section { background: var(--bg); position: relative; }
.stats-section .container { position: relative; z-index: 2; }
.section-num-3 { color: var(--accent); }
.stat-grid { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 28px; }
.stat-card {
  background: var(--card-bg); border-radius: var(--radius-lg); border: 1px solid var(--border);
  padding: 36px 24px; text-align: center; box-shadow: var(--shadow-default);
  transition: all var(--transition);
}
.stat-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.stat-num { font-size: 42px; font-weight: 700; color: var(--primary); line-height: 1.2; }
.stat-num sup { font-size: 16px; color: var(--text-muted); font-weight: 400; }
.stat-label { font-size: 13px; color: var(--text-muted); margin-top: 8px; }

.guard-strip {
  margin-top: 48px; background: var(--bg-light); border-radius: var(--radius-lg);
  border: 1px solid var(--border); padding: 28px 32px;
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 28px;
}
.guard-item { display: flex; align-items: flex-start; gap: 14px; }
.guard-icon {
  flex-shrink: 0; width: 40px; height: 40px; border-radius: 10px;
  background: rgba(59,124,173,.1); color: var(--primary);
  display: flex; align-items: center; justify-content: center; font-size: 17px;
}
.guard-item h4 { font-size: 15px; font-weight: 600; margin-bottom: 2px; }
.guard-item p { font-size: 13px; color: var(--text-muted); line-height: 1.5; }

/* Testimonial */
.testi-section { background: var(--bg-light); }
.testi-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
.testi-card {
  background: var(--card-bg); border-radius: var(--radius-lg); border: 1px solid var(--border);
  padding: 28px; box-shadow: var(--shadow-default); transition: all var(--transition);
}
.testi-card:nth-child(2) { margin-top: 28px; }
.testi-card:hover { box-shadow: var(--shadow-hover); }
.testi-card blockquote { font-size: 15px; color: var(--text-body); line-height: 1.8; margin-bottom: 18px; position: relative; padding-left: 20px; }
.testi-card blockquote::before {
  content: '“'; font-size: 40px; color: var(--accent); position: absolute; left: 0; top: -10px; line-height: 1; font-family: Georgia, serif;
}
.testi-meta { display: flex; align-items: center; gap: 12px; }
.testi-avatar {
  width: 40px; height: 40px; border-radius: 50%; background: var(--primary);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 14px; font-weight: 600; flex-shrink: 0;
}
.testi-meta strong { font-size: 14px; font-weight: 600; display: block; color: var(--text); }
.testi-meta span { font-size: 12px; color: var(--text-muted); }

/* News */
.news-section { background: var(--bg); }
.news-grid { display: grid; grid-template-columns: 1fr 320px; gap: 64px; }
.news-list { display: flex; flex-direction: column; }
.news-item {
  display: flex; align-items: center; gap: 20px; padding: 20px 0;
  border-bottom: 1px solid var(--border); transition: all var(--transition);
  border-radius: var(--radius-sm);
}
.news-item:first-child { padding-top: 0; }
.news-item:hover { background: rgba(255,255,255,.6); padding-left: 12px; padding-right: 12px; }
.news-cat {
  flex-shrink: 0; font-size: 12px; color: var(--primary);
  background: rgba(59,124,173,.08); padding: 3px 10px; border-radius: 20px;
}
.news-title { font-size: 15px; color: var(--text); font-weight: 500; flex: 1; line-height: 1.5; }
.news-title:hover { color: var(--primary); }
.news-date { font-size: 13px; color: var(--text-muted); flex-shrink: 0; }
.news-side { display: flex; flex-direction: column; gap: 24px; }
.news-side-card {
  background: var(--card-bg); border-radius: var(--radius-lg); border: 1px solid var(--border);
  padding: 28px; box-shadow: var(--shadow-default);
}
.news-side-card h4 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.news-side-card p { font-size: 14px; color: var(--text-body); margin-bottom: 16px; line-height: 1.6; }
.news-side-card .btn { font-size: 13px; padding: 8px 18px; }

/* FAQ */
.faq-section { background: var(--bg-light); }
.faq-wrap { max-width: 760px; margin: 0 auto; }
.faq-item {
  background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius-lg);
  margin-bottom: 16px; overflow: hidden; box-shadow: var(--shadow-default); transition: box-shadow var(--transition);
}
.faq-item:hover { box-shadow: var(--shadow-hover); }
.faq-item.open .faq-question::after { transform: rotate(45deg); }
.faq-question {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px; font-size: 16px; font-weight: 600; color: var(--text);
  background: none; border: none; text-align: left; gap: 16px;
}
.faq-question::after {
  content: '+'; font-size: 24px; color: var(--accent); line-height: 1; flex-shrink: 0;
  transition: transform var(--transition); font-weight: 400;
}
.faq-question:hover { color: var(--primary); }
.faq-question:focus { outline: 2px solid var(--primary-light); outline-offset: -2px; border-radius: var(--radius-lg); }
.faq-answer {
  max-height: 0; overflow: hidden; opacity: 0; transition: max-height .4s ease, opacity .3s ease, padding .3s ease;
}
.faq-item.open .faq-answer { max-height: 300px; opacity: 1; }
.faq-answer-inner {
  padding: 0 24px 20px; margin-left: 24px; position: relative; padding-left: 20px;
  border-left: 3px solid var(--accent); 
}
.faq-answer-inner p { font-size: 14px; color: var(--text-body); line-height: 1.7; }

/* CTA */
.cta-section { background: var(--bg); padding: 100px 0; }
.cta-card {
  background: var(--card-bg); border-radius: 20px; border: 1px solid var(--border);
  box-shadow: var(--shadow-default); padding: 56px 48px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px; position: relative; overflow: hidden;
}
.cta-card::before {
  content: ''; position: absolute; width: 320px; height: 320px; border-radius: 50%;
  background: rgba(192,138,78,.06); top: -80px; right: -80px;
}
.cta-text h2 { font-size: 32px; font-weight: 700; line-height: 1.3; margin-bottom: 16px; }
.cta-text p { color: var(--text-body); font-size: 15px; line-height: 1.7; margin-bottom: 28px; }
.cta-contacts { display: flex; flex-direction: column; gap: 14px; margin-top: 8px; }
.cta-contact { display: flex; align-items: center; gap: 12px; font-size: 14px; color: var(--text-body); }
.cta-contact i {
  width: 38px; height: 38px; border-radius: 8px; background: rgba(59,124,173,.1);
  color: var(--primary); display: flex; align-items: center; justify-content: center; font-style: normal;
}
.cta-form { background: var(--bg-light); border-radius: var(--radius-lg); padding: 32px; border: 1px solid var(--border); }
.form-row { margin-bottom: 18px; }
.form-row label { display: block; font-size: 13px; color: var(--text-muted); margin-bottom: 6px; }
.form-row input, .form-row select, .form-row textarea {
  width: 100%; padding: 11px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: #fff; font-size: 14px; color: var(--text); font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-row textarea { height: 90px; resize: vertical; }
.form-row input:focus, .form-row select:focus, .form-row textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(59,124,173,.15);
}
.form-row input:hover, .form-row select:hover, .form-row textarea:hover { border-color: #b8c7d4; }

/* Footer */
.site-footer {
  background: var(--bg-light); border-top: 1px solid var(--border); padding: 56px 0 0;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; padding-bottom: 40px; }
.footer-brand h3 { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.footer-brand p { font-size: 13px; color: var(--text-muted); max-width: 280px; line-height: 1.6; }
.footer-col h4 { font-size: 14px; font-weight: 600; margin-bottom: 14px; color: var(--text); }
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col a { font-size: 13px; color: var(--text-body); transition: color var(--transition); }
.footer-col a:hover { color: var(--primary); }
.footer-bottom {
  border-top: 1px solid var(--border); padding: 20px 0;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}
.footer-bottom p { font-size: 12px; color: var(--text-muted); }
.footer-bottom .footer-domain { color: var(--text-muted); }

/* Responsive */
@media (max-width: 991px) {
  .hero h1 { font-size: 36px; }
  .plan-grid { grid-template-columns: 1fr 1fr; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .news-grid { grid-template-columns: 1fr; gap: 40px; }
  .cta-card { grid-template-columns: 1fr; padding: 40px 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
  .section { padding: 48px 0; }
  .hero { min-height: auto; padding: 60px 0 0; }
  .hero-content { padding: 60px 20px 40px; }
  .hero h1 { font-size: 28px; }
  .hero-sub { font-size: 15px; }
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.mobile-open {
    display: flex; position: absolute; top: var(--header-h); left: 0; right: 0;
    background: #fff; flex-direction: column; padding: 16px 24px;
    border-bottom: 1px solid var(--border); box-shadow: var(--shadow-default);
    gap: 4px; align-items: flex-start;
  }
  .nav-links.mobile-open a { padding: 14px 0; font-size: 16px; border-bottom: 1px solid var(--border); width: 100%; }
  .nav-links.mobile-open a:last-child { border-bottom: none; }
  .nav-cta { text-align: center; }
  .pain-grid, .process-grid { grid-template-columns: 1fr; gap: 40px; }
  .pain-figure img, .process-figure img { height: 260px; }
  .plan-grid { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .stat-num { font-size: 34px; }
  .guard-strip { grid-template-columns: 1fr; padding: 24px; }
  .testi-grid { grid-template-columns: 1fr; }
  .testi-card:nth-child(2) { margin-top: 0; }
  .news-item { flex-wrap: wrap; gap: 8px; }
  .news-cat { font-size: 11px; }
  .news-date { font-size: 12px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-strip .container { gap: 12px; }
  .cta-card { padding: 32px 24px; }
  .cta-form { padding: 24px 20px; }
}