/*
Theme Name: iStatistic Personal
Theme URI: https://istatistic.online
Author: iStatistic
Author URI: https://istatistic.online
Description: A clean bilingual Chinese-English personal statistics consulting theme for WordPress.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 7.4
License: GPLv2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: istatistic-personal
Tags: personal, blog, portfolio, two-columns, custom-logo, bilingual
*/

:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --text: #172033;
  --muted: #667085;
  --line: #e7ebf0;
  --primary: #1d4ed8;
  --primary-dark: #163eaf;
  --accent: #0f766e;
  --soft-blue: #eef4ff;
  --soft-green: #ecfdf5;
  --shadow: 0 18px 60px rgba(18, 33, 61, .08);
  --radius: 22px;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(29,78,216,.10), transparent 34rem),
    radial-gradient(circle at top right, rgba(15,118,110,.10), transparent 30rem),
    var(--bg);
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }

.wrap {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: rgba(246,248,251,.82);
  border-bottom: 1px solid rgba(231,235,240,.85);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
  gap: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 760;
  letter-spacing: -.02em;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 12px 30px rgba(29,78,216,.24);
  font-weight: 800;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  color: #344054;
  font-size: 14px;
}

.nav-links a:hover { color: var(--primary); }

.lang-toggle {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 12px;
  cursor: pointer;
  font-weight: 650;
  box-shadow: 0 6px 18px rgba(18,33,61,.05);
}

.mobile-menu { display: none; }

.hero {
  padding: 86px 0 54px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 34px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  color: var(--primary-dark);
  background: var(--soft-blue);
  font-size: 13px;
  font-weight: 700;
}

.hero h1 {
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.08;
  letter-spacing: -.05em;
  margin: 18px 0;
}

.hero p {
  max-width: 700px;
  color: var(--muted);
  font-size: 18px;
  margin: 0 0 28px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  padding: 12px 18px;
  border: 1px solid transparent;
  font-weight: 760;
  transition: .18s ease;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 16px 36px rgba(29,78,216,.25);
}

.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-secondary {
  background: var(--surface);
  border-color: var(--line);
  color: var(--text);
}
.btn-secondary:hover { transform: translateY(-1px); border-color: #c8d1dc; }

.hero-card {
  background: rgba(255,255,255,.72);
  border: 1px solid rgba(231,235,240,.9);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.metric {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
}

.metric strong {
  display: block;
  font-size: 26px;
  line-height: 1.1;
  color: var(--primary);
  margin-bottom: 4px;
}

.metric span { color: var(--muted); font-size: 13px; }

.section {
  padding: 54px 0;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.section h2 {
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.16;
  letter-spacing: -.035em;
  margin: 0;
}

.section-desc {
  color: var(--muted);
  max-width: 620px;
  margin: 10px 0 0;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  background: rgba(255,255,255,.82);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 10px 36px rgba(18, 33, 61, .05);
}

.card h3 {
  margin: 12px 0 8px;
  font-size: 20px;
  letter-spacing: -.02em;
}

.card p, .case p, .step p, .note p {
  color: var(--muted);
  margin: 0;
}

.icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--soft-blue);
  color: var(--primary);
  font-weight: 800;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.case {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}

.case-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
  margin-bottom: 10px;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--soft-green);
  color: var(--accent);
  font-size: 12px;
  font-weight: 760;
  white-space: nowrap;
}

.process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.step {
  background: rgba(255,255,255,.82);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}

.step-num {
  width: 34px;
  height: 34px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 800;
  margin-bottom: 14px;
}

.note {
  margin-top: 22px;
  border-radius: var(--radius);
  border: 1px solid rgba(29,78,216,.16);
  background: var(--soft-blue);
  padding: 20px 22px;
}

.contact {
  background: #101828;
  color: #fff;
  border-radius: 30px;
  padding: 34px;
  display: grid;
  grid-template-columns: 1fr .85fr;
  gap: 26px;
  align-items: center;
}

.contact p { color: rgba(255,255,255,.72); }
.contact-list {
  display: grid;
  gap: 12px;
}
.contact-item {
  border: 1px solid rgba(255,255,255,.16);
  background: rgba(255,255,255,.06);
  border-radius: 16px;
  padding: 14px 16px;
  color: rgba(255,255,255,.88);
}
.contact-item strong {
  display: block;
  color: #fff;
  margin-bottom: 2px;
}

.site-footer {
  color: var(--muted);
  padding: 28px 0 48px;
  font-size: 14px;
}

[lang-part="en"] { display: none; }
body.en [lang-part="zh"] { display: none; }
body.en [lang-part="en"] { display: inline; }
body.en div[lang-part="en"],
body.en p[lang-part="en"],
body.en h1[lang-part="en"],
body.en h2[lang-part="en"],
body.en h3[lang-part="en"],
body.en span[lang-part="en"],
body.en li[lang-part="en"] { display: initial; }
body.en .block-en { display: block; }
.block-en { display: none; }
body.en .block-zh { display: none; }

@media (max-width: 900px) {
  .hero-grid, .contact { grid-template-columns: 1fr; }
  .cards, .process { grid-template-columns: repeat(2, 1fr); }
  .nav-links { display: none; }
  .mobile-menu { display: inline-flex; }
}

@media (max-width: 640px) {
  .wrap { width: min(100% - 24px, var(--max)); }
  .hero { padding: 54px 0 32px; }
  .cards, .case-grid, .process, .metric-grid { grid-template-columns: 1fr; }
  .section-head { display: block; }
  .contact { padding: 24px; border-radius: 22px; }
}