/* ============================================
   portal.css — 前台门户公共样式
   ============================================ */

/* --- 2.1.1 基础重置、系统字体栈、CSS 颜色变量 --- */

:root {
  --color-bg: #f5f5f5;
  --color-surface: #fff;
  --color-border: #e5e7eb;
  --color-text: #333;
  --color-text-muted: #666;
  --color-primary: #4a7c59;
  --font-stack: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-stack);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

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

img { max-width: 100%; display: block; }

/* --- 2.1.2 导航栏样式（含汉堡菜单移动端适配） --- */

.navbar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-logo:hover { text-decoration: none; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-link {
  display: inline-block;
  padding: 6px 14px;
  color: var(--color-text-muted);
  font-size: 14px;
  text-decoration: none;
  border-radius: 4px;
  transition: background 0.2s, color 0.2s;
}
.nav-link:hover,
.nav-link.active {
  background: var(--color-bg);
  color: var(--color-text);
  text-decoration: none;
}

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  line-height: 1;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: transform 0.2s;
}

.nav-mobile {
  display: none;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 8px 24px 16px;
}
.nav-mobile.open { display: block; }
.nav-mobile .nav-link {
  display: block;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
}
.nav-mobile .nav-link:last-child { border-bottom: none; }

/* --- 2.1.3 卡片网格样式（三列/双列/单列响应式断点） --- */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.hero {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 48px 24px;
  text-align: center;
}
.hero h1 {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 8px;
}
.hero p {
  color: var(--color-text-muted);
  font-size: 16px;
  max-width: 520px;
  margin: 0 auto;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding: 32px 0;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 24px;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: border-color 0.2s;
}
.card:hover {
  border-color: #999;
  text-decoration: none;
}

.card-icon {
  font-size: 32px;
  margin-bottom: 12px;
}

.card-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text);
}

.card-desc {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}

.billing-tag {
  display: inline-block;
  font-size: 12px;
  padding: 2px 8px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  color: var(--color-text-muted);
  background: var(--color-bg);
}

/* --- 卡片操作区 --- */

.card-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--color-border);
}

.btn-sm {
    padding: 4px 14px;
    font-size: 13px;
}

.btn-disabled {
    background: var(--color-bg);
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
    cursor: not-allowed;
}

.detail-link {
    font-size: 13px;
    color: var(--color-primary);
}

/* --- 2.1.4 项目详情页样式（简介区、教程区、下载区） --- */

.project-detail {
  max-width: 1000px;
  margin: 32px auto;
  padding: 0 24px;
}

.project-detail .section-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.intro-section,
.tutorial-section,
.download-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 24px;
  margin-bottom: 24px;
}

.intro-section h1 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 12px;
}

.intro-section p {
  color: var(--color-text-muted);
  line-height: 1.8;
}

.tutorial-section {
  line-height: 1.8;
  font-size: 15px;
}
.tutorial-section ol,
.tutorial-section ul {
  padding-left: 20px;
  margin: 8px 0;
}
.tutorial-section li {
  margin-bottom: 6px;
}

.download-section .download-info {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}
.download-section .download-info span {
  margin-right: 16px;
}

.download-section .no-download {
  color: var(--color-text-muted);
  font-size: 14px;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 8px 20px;
  font-size: 14px;
  font-family: var(--font-stack);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s;
}
.btn:hover { text-decoration: none; }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background: #3d6a4b;
}

.btn-download {
  background: var(--color-primary);
  color: #fff;
  padding: 10px 28px;
  font-size: 15px;
}
.btn-download:hover {
  background: #3d6a4b;
}

/* --- 2.1.5 API 文档页样式（代码块、参数表格） --- */

.api-doc {
  max-width: 1000px;
  margin: 32px auto;
  padding: 0 24px;
}

.api-doc h1 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 24px;
}

.api-doc h2 {
  font-size: 18px;
  font-weight: 600;
  margin: 32px 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--color-border);
}

.api-doc h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 20px 0 8px;
}

.api-doc p {
  margin-bottom: 12px;
  line-height: 1.7;
}

.api-doc table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 24px;
  font-size: 14px;
}
.api-doc th,
.api-doc td {
  padding: 10px 12px;
  text-align: left;
  border: 1px solid var(--color-border);
}
.api-doc th {
  background: var(--color-bg);
  font-weight: 600;
  color: var(--color-text);
}
.api-doc td {
  color: var(--color-text-muted);
}

.api-doc pre {
  background: #1e1e1e;
  color: #d4d4d4;
  padding: 16px;
  border-radius: 4px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.5;
  margin: 12px 0 24px;
}

.api-doc code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 13px;
}

.api-doc p code,
.api-doc li code,
.api-doc td code {
  background: var(--color-bg);
  padding: 2px 6px;
  border-radius: 3px;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

/* --- Footer --- */

footer {
  text-align: center;
  padding: 32px 24px;
  color: var(--color-text-muted);
  font-size: 13px;
  border-top: 1px solid var(--color-border);
  margin-top: 48px;
  background: var(--color-surface);
}

/* --- 404 page --- */

.page-404 {
  text-align: center;
  padding: 80px 24px;
}
.page-404 h1 {
  font-size: 48px;
  font-weight: 600;
  color: var(--color-border);
  margin-bottom: 12px;
}
.page-404 p {
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

/* --- 登录页样式 --- */

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
    padding: 24px;
}

.login-card {
    width: 100%;
    max-width: 380px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 32px;
}

.login-card h1 {
    font-size: 20px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 24px;
}

.login-card .form-group {
    margin-bottom: 16px;
}
.login-card .form-group label {
    display: block;
    font-size: 14px;
    margin-bottom: 6px;
    color: var(--color-text);
}
.login-card .form-group input {
    width: 100%;
    padding: 8px 12px;
    font-size: 14px;
    font-family: var(--font-stack);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    outline: none;
    transition: border-color 0.2s;
}
.login-card .form-group input:focus {
    border-color: var(--color-primary);
}

.login-card .btn-primary {
    width: 100%;
    padding: 10px;
    font-size: 15px;
}

.login-error {
    color: #c62828;
    font-size: 14px;
    text-align: center;
    margin-bottom: 16px;
}

/* --- 悬浮客服组件 --- */

.float-contact {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 200;
}

.float-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.2s;
}
.float-btn:hover {
    border-color: var(--color-primary);
}

.float-panel {
    display: none;
    position: absolute;
    bottom: 56px;
    right: 0;
    width: 260px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 16px;
}
.float-panel.open {
    display: block;
}

.float-item {
    margin-bottom: 12px;
}
.float-item:last-child {
    margin-bottom: 0;
}
.float-label {
    display: block;
    font-size: 12px;
    color: var(--color-text-muted);
    margin-bottom: 4px;
}
.float-item img {
    width: 100%;
    border: 1px solid var(--color-border);
    border-radius: 4px;
}

/* --- 底部备案号 --- */

.icp {
    margin-top: 4px;
    font-size: 12px;
    color: var(--color-text-muted);
}

/* --- 导航 LOGO 图片 --- */

.nav-logo-img {
    height: 32px;
    width: auto;
}

/* --- Responsive breakpoints --- */

@media (max-width: 1023px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

  .nav-links { display: none; }
  .hamburger { display: block; }

  .hero { padding: 32px 16px; }
  .hero h1 { font-size: 22px; }
  .hero p { font-size: 14px; }

  .container { padding: 0 16px; }
  .project-detail { padding: 0 16px; }
  .api-doc { padding: 0 16px; }

  .api-doc table { font-size: 13px; }
  .api-doc th,
  .api-doc td { padding: 8px; }

  .api-doc pre { font-size: 12px; padding: 12px; }

  .float-contact {
    bottom: 16px;
    right: 16px;
  }
  .float-panel {
    width: 220px;
  }
}