/* 睿睿管理系统 - 静态介绍页样式 */

:root {
  --color-primary: #0f766e;
  --color-primary-dark: #0b5c56;
  --color-primary-light: #ecfdf9;
  --color-bg: #f7f7f8;
  --color-surface: #ffffff;
  --color-text: #1f2937;
  --color-text-muted: #6b7280;
  --color-border: #e5e7eb;
  --shadow-soft: 0 4px 16px rgba(15, 23, 42, 0.06);
  --shadow-hover: 0 8px 24px rgba(15, 23, 42, 0.10);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
}

img,
svg {
  max-width: 100%;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 顶部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(150%) blur(6px);
  border-bottom: 1px solid var(--color-border);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  max-width: 1120px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--color-text);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary);
  color: #fff;
  flex-shrink: 0;
}

.brand-mark svg {
  width: 18px;
  height: 18px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  color: var(--color-text);
  font-size: 14px;
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.nav-links a.nav-cta {
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary);
  color: #fff;
}

.nav-links a.nav-cta:hover {
  background-color: var(--color-primary-dark);
  color: #fff;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  cursor: pointer;
}

.nav-toggle svg {
  width: 18px;
  height: 18px;
  color: var(--color-text);
}

/* Hero */
.hero {
  padding: 88px 0 72px;
  background: linear-gradient(180deg, var(--color-primary-light) 0%, var(--color-bg) 100%);
  border-bottom: 1px solid var(--color-border);
}

.hero-inner {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.hero-tag {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: 40px;
  line-height: 1.3;
  margin: 0 0 16px;
  color: var(--color-text);
}

.hero p {
  font-size: 16px;
  color: var(--color-text-muted);
  margin: 0 auto 32px;
  max-width: 560px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  text-decoration: none;
  box-shadow: var(--shadow-hover);
}

.btn-primary[aria-disabled="true"] {
  cursor: not-allowed;
}

.btn-hint {
  display: block;
  margin-top: 12px;
  font-size: 13px;
  color: var(--color-text-muted);
}

/* 通用板块 */
.section {
  padding: 72px 0;
}

.section-alt {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-header {
  max-width: 640px;
  margin: 0 auto 40px;
  text-align: center;
}

.section-eyebrow {
  display: block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.section-header h2 {
  font-size: 28px;
  margin: 0 0 12px;
  color: var(--color-text);
}

.section-header p {
  color: var(--color-text-muted);
  margin: 0;
  font-size: 15px;
}

/* 平台概览 */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.overview-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-soft);
}

.overview-item h3 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--color-text);
}

.overview-item p {
  margin: 0;
  font-size: 14px;
  color: var(--color-text-muted);
}

/* 功能模块卡片 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-soft);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.feature-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  margin-bottom: 16px;
}

.feature-icon svg {
  width: 22px;
  height: 22px;
}

.feature-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--color-text);
}

.feature-card p {
  margin: 0;
  font-size: 14px;
  color: var(--color-text-muted);
}

/* 关于我们 */
.about-panel {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 36px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
  align-items: center;
}

.about-panel p {
  margin: 0 0 12px;
  color: var(--color-text-muted);
  font-size: 15px;
}

.about-panel p:last-child {
  margin-bottom: 0;
}

.info-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.info-list li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-bg);
  font-size: 14px;
}

.info-list span:first-child {
  color: var(--color-text-muted);
}

.info-list span:last-child {
  color: var(--color-text);
  font-weight: 600;
  text-align: right;
}

/* 页脚 */
.site-footer {
  padding: 32px 0;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
  font-size: 13px;
  color: var(--color-text-muted);
}

.footer-inner a {
  color: var(--color-text-muted);
}

.footer-inner a:hover {
  color: var(--color-primary);
}

/* 响应式 */
@media (max-width: 860px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-soft);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease;
  }

  .nav-links.is-open {
    max-height: 240px;
  }

  .nav-links a {
    width: 100%;
    padding: 14px 24px;
    border-top: 1px solid var(--color-border);
  }

  .nav-toggle {
    display: inline-flex;
  }

  .hero {
    padding: 64px 0 48px;
  }

  .hero h1 {
    font-size: 30px;
  }

  .section {
    padding: 48px 0;
  }

  .overview-grid {
    grid-template-columns: 1fr;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .about-panel {
    padding: 24px;
  }
}

/* 登录页 */
.login-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, var(--color-primary-light) 0%, var(--color-bg) 46%);
}

.login-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
}

.login-card {
  width: 100%;
  max-width: 400px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 36px 32px 32px;
}

.login-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--color-text);
  margin-bottom: 6px;
}

.login-brand .brand-mark {
  width: 34px;
  height: 34px;
}

.login-brand .brand-mark svg {
  width: 19px;
  height: 19px;
}

.login-title {
  text-align: center;
  margin: 14px 0 4px;
  font-size: 22px;
  color: var(--color-text);
}

.login-subtitle {
  text-align: center;
  margin: 0 0 26px;
  font-size: 14px;
  color: var(--color-text-muted);
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
}

.field input[type="text"],
.field input[type="password"] {
  width: 100%;
  padding: 11px 13px;
  font-size: 14px;
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.field input:focus {
  border-color: var(--color-primary);
  background-color: #fff;
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.12);
}

.login-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--color-text-muted);
}

.login-row label {
  display: flex;
  align-items: center;
  gap: 7px;
  cursor: pointer;
}

.login-row input[type="checkbox"] {
  width: 15px;
  height: 15px;
  accent-color: var(--color-primary);
}

.btn-block {
  width: 100%;
  justify-content: center;
  margin-top: 4px;
}

.login-msg {
  display: none;
  margin: 2px 0 -4px;
  padding: 10px 12px;
  font-size: 13px;
  border-radius: var(--radius-sm);
  background-color: #fef2f2;
  border: 1px solid #fecaca;
  color: #b91c1c;
}

.login-msg.is-visible {
  display: block;
}

.login-back {
  display: block;
  text-align: center;
  margin-top: 20px;
  font-size: 13px;
  color: var(--color-text-muted);
}

.login-back:hover {
  color: var(--color-primary);
}

.login-footer {
  padding: 24px 20px;
  text-align: center;
  font-size: 13px;
  color: var(--color-text-muted);
}

.login-footer a {
  color: var(--color-text-muted);
}

.login-footer a:hover {
  color: var(--color-primary);
}