/* xiutu.org — 免费在线照片修图 样式表 */
:root {
  --blue: #1a9fff;
  --blue-dark: #0b7ed0;
  --blue-light: #e8f4ff;
  --ink: #1f2733;
  --ink-2: #5a677a;
  --line: #e3e8ef;
  --bg: #f4f6f9;
  --card: #ffffff;
  --radius: 12px;
  --shadow: 0 4px 18px rgba(31, 39, 51, .08);
  --dark: #2d3138;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
}
img { max-width: 100%; }
a { color: var(--blue); text-decoration: none; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block; padding: 9px 20px; border-radius: 8px;
  font-size: 15px; font-weight: 600; border: 1px solid transparent;
  cursor: pointer; transition: .18s; white-space: nowrap;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }
.btn-lg { padding: 13px 30px; font-size: 17px; border-radius: 10px; }

/* ---------- 头部 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 24px; height: 62px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--ink); }
.logo-mark {
  width: 36px; height: 36px; border-radius: 9px; background: var(--blue);
  color: #fff; font-size: 20px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.logo-text { font-size: 19px; font-weight: 700; line-height: 1.1; }
.logo-text small { display: block; font-size: 11px; font-weight: 500; color: var(--ink-2); }
.main-nav { display: flex; gap: 4px; margin-left: auto; }
.main-nav a {
  padding: 7px 14px; border-radius: 8px; color: var(--ink-2); font-size: 15px;
}
.main-nav a:hover { color: var(--blue); background: var(--blue-light); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.nav-toggle {
  display: none; background: none; border: 1px solid var(--line);
  border-radius: 8px; font-size: 18px; padding: 5px 12px; cursor: pointer;
}

/* ---------- Hero ---------- */
.hero { padding: 64px 0 72px; background: linear-gradient(180deg, #eaf5ff 0%, var(--bg) 100%); }
.hero-inner { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.hero-tag {
  display: inline-block; background: var(--blue-light); color: var(--blue-dark);
  font-size: 13px; font-weight: 600; padding: 4px 14px; border-radius: 99px; margin-bottom: 18px;
}
.hero h1 { font-size: 42px; line-height: 1.25; letter-spacing: .5px; }
.hero h1 .accent { color: var(--blue); }
.hero-sub { color: var(--ink-2); font-size: 16px; margin: 16px 0 26px; max-width: 520px; }
.hero-btns { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 20px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 8px 22px; list-style: none; color: var(--ink-2); font-size: 14px; }

/* 模拟编辑器窗口 */
.mock-window {
  background: #fff; border-radius: 14px; box-shadow: 0 20px 50px rgba(26,159,255,.18);
  overflow: hidden; border: 1px solid var(--line);
}
.mock-bar {
  display: flex; align-items: center; gap: 6px; background: var(--dark);
  padding: 10px 14px;
}
.mock-bar span { width: 10px; height: 10px; border-radius: 50%; background: #4a4f57; }
.mock-bar span:nth-child(1) { background: #ff5f57; }
.mock-bar span:nth-child(2) { background: #febc2e; }
.mock-bar span:nth-child(3) { background: #28c840; }
.mock-bar em { font-style: normal; color: #9aa3ad; font-size: 12px; margin-left: 10px; }
.mock-body { display: grid; grid-template-columns: 44px 1fr 96px; min-height: 240px; }
.mock-tools { background: #33373d; display: flex; flex-direction: column; gap: 10px; padding: 12px 0; align-items: center; }
.mock-tools i { width: 26px; height: 26px; border-radius: 6px; background: #454a52; display: block; }
.mock-tools i:first-child { background: var(--blue); }
.mock-canvas {
  background: repeating-conic-gradient(#e9edf2 0 25%, #f7f9fb 0 50%) 0 0/20px 20px;
  display: flex; align-items: center; justify-content: center; position: relative; padding: 26px;
}
.mock-img { width: 78%; box-shadow: 0 6px 22px rgba(0,0,0,.15); }
.mock-crop {
  position: absolute; width: 46%; height: 52%; border: 2px dashed var(--blue);
  left: 27%; top: 26%; background: rgba(26,159,255,.08);
}
.mock-panel { background: #f0f3f7; border-left: 1px solid var(--line); padding: 14px 12px; }
.mock-panel b { display: block; height: 9px; border-radius: 5px; background: #dde4ec; margin-bottom: 12px; }
.mock-panel b:nth-child(1) { width: 90%; background: var(--blue-light); }
.mock-panel b:nth-child(3) { width: 60%; }

/* ---------- 通用 section ---------- */
section { padding: 68px 0; }
.sec-title { text-align: center; font-size: 30px; margin-bottom: 10px; }
.sec-sub { text-align: center; color: var(--ink-2); margin-bottom: 40px; }

/* ---------- 功能卡片 ---------- */
.features { background: #fff; }
.feature-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.feature-card {
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 24px; color: var(--ink); transition: .2s; display: block;
}
.feature-card:hover {
  transform: translateY(-4px); box-shadow: var(--shadow);
  border-color: var(--blue); background: var(--blue-light);
}
.f-icon {
  width: 48px; height: 48px; border-radius: 12px; background: var(--blue-light);
  color: var(--blue); font-size: 24px; display: flex; align-items: center;
  justify-content: center; margin-bottom: 14px;
}
.feature-card h3 { font-size: 18px; margin-bottom: 8px; }
.feature-card p { color: var(--ink-2); font-size: 14px; }

/* ---------- 格式 ---------- */
.format-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin-bottom: 14px; }
.fmt {
  background: #fff; border: 1px solid var(--line); border-radius: 10px;
  padding: 12px 30px; font-weight: 700; font-size: 17px; color: var(--blue-dark);
  box-shadow: var(--shadow);
}

/* ---------- 步骤 ---------- */
.step-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step {
  background: #fff; border-radius: var(--radius); padding: 28px;
  border: 1px solid var(--line); position: relative;
}
.step b {
  width: 40px; height: 40px; border-radius: 50%; background: var(--blue); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 18px; margin-bottom: 14px;
}
.step h3 { font-size: 17px; margin-bottom: 6px; }
.step p { color: var(--ink-2); font-size: 14px; }

/* ---------- FAQ ---------- */
.faq { background: #fff; }
.faq-list { max-width: 760px; margin: 0 auto; }
details {
  border: 1px solid var(--line); border-radius: 10px; background: var(--bg);
  padding: 16px 22px; margin-bottom: 12px;
}
details summary { font-weight: 600; cursor: pointer; font-size: 15.5px; }
details p { color: var(--ink-2); font-size: 14.5px; margin-top: 10px; }

/* ---------- 联系 ---------- */
.contact-cards { display: flex; justify-content: center; gap: 24px; flex-wrap: wrap; }
.contact-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 44px; text-align: center; transition: .2s; box-shadow: var(--shadow);
}
.contact-card:hover { border-color: var(--blue); transform: translateY(-3px); }
.c-icon { font-size: 30px; color: var(--blue); margin-bottom: 10px; }
.contact-card b { display: block; font-size: 15px; }
.contact-card span { color: var(--ink-2); font-size: 15px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--dark); color: #9aa3ad; padding: 26px 0; font-size: 14px; }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.site-footer a { color: #c7d3e0; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 36px; }
  .hero h1 { font-size: 32px; }
  .feature-grid, .step-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .main-nav {
    display: none; position: absolute; top: 62px; left: 0; right: 0;
    background: #fff; flex-direction: column; padding: 10px 20px 16px;
    border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
  }
  .main-nav.open { display: flex; }
  .nav-toggle { display: block; }
  .header-actions .btn-ghost { display: none; }
  .feature-grid, .step-grid { grid-template-columns: 1fr; }
  section { padding: 48px 0; }
  .hero { padding: 44px 0 52px; }
  .hero h1 { font-size: 27px; }
  .footer-inner { justify-content: center; text-align: center; }
}