/* ========== StarBridge  · 公共样式 ========== */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #7a5af8;
  --primary-deep: #6246e0;
  --primary-grad: linear-gradient(135deg, #9d7bff 0%, #6d4df2 100%);
  --ink: #17122b;
  --ink-2: #4a4364;
  --ink-3: #8d87a8;
  --card: #ffffff;
  --border: #eae6f7;
  --bg: #f7f5fe;
  --glow-1: rgba(157, 123, 255, .28);
  --glow-2: rgba(209, 190, 255, .35);
  --shadow-lg: 0 18px 50px -12px rgba(102, 76, 200, .18);
  --shadow-md: 0 8px 28px -8px rgba(102, 76, 200, .14);
  --shadow-sm: 0 3px 12px -2px rgba(102, 76, 200, .10);
  --radius: 20px;
}

[data-theme="dark"] {
  --ink: #ece9fb;
  --ink-2: #c4bedd;
  --ink-3: #8d87a8;
  --card: #1a1626;
  --border: #2c2640;
  --bg: #100c1a;
  --glow-1: rgba(124, 92, 240, .22);
  --glow-2: rgba(80, 60, 180, .18);
  --shadow-lg: 0 18px 50px -12px rgba(0, 0, 0, .5);
  --shadow-md: 0 8px 28px -8px rgba(0, 0, 0, .45);
  --shadow-sm: 0 3px 12px -2px rgba(0, 0, 0, .4);
}

html { scroll-behavior: smooth; }

body {
  font-family: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, sans-serif;
  color: var(--ink);
  background: var(--bg);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background .3s ease, color .3s ease;
}

/* 背景光晕 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 520px at 12% 0%, var(--glow-1), transparent 60%),
    radial-gradient(1100px 640px at 88% 8%, var(--glow-2), transparent 62%),
    radial-gradient(800px 500px at 50% 100%, var(--glow-2), transparent 65%);
  pointer-events: none;
}

a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
img { display: block; }

/* ========== 顶部导航 ========== */
.nav {
  position: relative;
  z-index: 50;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1240px;
  margin: 0 auto;
  padding: 22px 32px;
}
.nav-left { display: flex; align-items: center; gap: 10px; }
.nav-logo { width: 40px; height: 40px; border-radius: 50%; box-shadow: var(--shadow-sm); }
.nav-brand { font-size: 19px; font-weight: 800; letter-spacing: .2px; }

.nav-center {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 34px;
}
.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-2);
  padding: 6px 2px;
  transition: color .2s;
}
.nav-link:hover { color: var(--primary); }
.nav-link.active { color: var(--primary); }
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -14px;
  transform: translateX(-50%);
  width: 26px;
  height: 3px;
  border-radius: 3px;
  background: var(--primary);
}

.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--border);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-2);
  box-shadow: var(--shadow-sm);
  transition: transform .15s, box-shadow .2s;
}
.nav-pill:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.nav-icon-btn {
  width: 40px; height: 40px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  color: var(--ink-2);
  transition: transform .15s;
}
.nav-icon-btn:hover { transform: translateY(-1px); }
.nav-login {
  padding: 10px 26px;
  border-radius: 999px;
  background: #1a1333;
  color: #fff;
  font-size: 14.5px;
  font-weight: 700;
  box-shadow: 0 8px 22px -6px rgba(26, 19, 51, .45);
  transition: transform .15s, box-shadow .2s;
}
[data-theme="dark"] .nav-login { background: #ece9fb; color: #1a1333; }
.nav-login:hover { transform: translateY(-1px); }

/* 语言下拉（纯外观） */
.lang-wrap { position: relative; }
.lang-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  min-width: 120px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow-md);
  padding: 6px;
  display: none;
}
.lang-menu.open { display: block; }
.lang-menu button {
  display: flex; align-items: center; gap: 8px;
  width: 100%;
  padding: 9px 12px;
  border-radius: 10px;
  font-size: 14px;
  color: var(--ink-2);
  transition: background .15s;
}
.lang-menu button:hover { background: rgba(122, 90, 248, .1); }

/* ========== 按钮 ========== */
.btn-dark {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 34px;
  border-radius: 999px;
  background: #1a1333;
  color: #fff;
  font-size: 15.5px;
  font-weight: 700;
  box-shadow: 0 14px 30px -8px rgba(26, 19, 51, .4);
  transition: transform .15s, box-shadow .2s;
}
[data-theme="dark"] .btn-dark { background: #ece9fb; color: #1a1333; }
.btn-dark:hover { transform: translateY(-2px); }

.btn-light {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 34px;
  border-radius: 999px;
  background: var(--card);
  color: var(--ink);
  border: 1px solid var(--border);
  font-size: 15.5px;
  font-weight: 700;
  box-shadow: var(--shadow-sm);
  transition: transform .15s, box-shadow .2s;
}
.btn-light:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

.btn-primary {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 30px;
  border-radius: 14px;
  background: var(--primary-grad);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  box-shadow: 0 12px 26px -8px rgba(109, 77, 242, .55);
  transition: transform .15s, box-shadow .2s, opacity .2s;
}
.btn-primary:hover { transform: translateY(-2px); opacity: .95; }

/* ========== 页脚 ========== */
.footer {
  text-align: center;
  padding: 34px 20px 30px;
  color: var(--ink-3);
  font-size: 13.5px;
}
.footer a { color: var(--ink-2); font-weight: 600; margin: 0 4px; }
.footer a:hover { color: var(--primary); }
.footer .foot-links { margin-left: 14px; }

/* ========== 通用卡片 ========== */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

/* 输入框 */
.field {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 14px;
  padding: 0 16px;
  transition: border-color .2s, box-shadow .2s;
}
.field:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(122, 90, 248, .15);
}
.field input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  height: 50px;
  font-size: 14.5px;
  color: var(--ink);
  font-family: inherit;
}
.field input::placeholder { color: var(--ink-3); }
.field svg { flex-shrink: 0; color: var(--ink-3); }

@media (max-width: 900px) {
  .nav-center { display: none; }
  .nav { padding: 16px 20px; }
}

/* ========== RTL（阿拉伯语）适配 ========== */
[dir="rtl"] body { letter-spacing: 0; }
[dir="rtl"] .hero-title { letter-spacing: 0; }
[dir="rtl"] .nav-center { direction: rtl; }
[dir="rtl"] .forgot-row { justify-content: flex-start; }
[dir="rtl"] .legend i, [dir="rtl"] .pv-legend i { margin-right: 0; margin-left: 6px; }