/* ==========================================================================
   base.css — 基础样式层（变量 / Reset / 排版 / 按钮 / 表单 / 表格 / 提示 / 工具类）
   项目：汽车测试设备外贸官网（工业科技蓝灰风格 · 中英双语前台 + 中文管理后台）
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 设计变量
   -------------------------------------------------------------------------- */
:root {
  --c-primary: #1466B8;
  --c-primary-dark: #0F55A0;
  --c-primary-light: #E8F1FA;
  --c-navy: #0B2A4A;
  --c-navy-2: #123A63;
  --c-steel: #5A6B7B;
  --c-steel-light: #8A9AAB;
  --c-bg: #F3F6F9;
  --c-bg-white: #FFFFFF;
  --c-line: #DCE3EA;
  --c-text: #1E2A36;
  --c-text-2: #46586A;
  --c-accent: #F5821F;
  --c-success: #1FA05A;
  --c-warning: #E8A33D;
  --c-danger: #D64545;
  --c-info: #2E8BC0;
  --grad-hero: linear-gradient(135deg, rgba(11,42,74,.94) 0%, rgba(18,58,99,.72) 45%, rgba(20,102,184,.55) 100%);
  --font-cn: "PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-en: Inter,"Segoe UI",Roboto,Arial,sans-serif;

  /* 派生值：圆角 / 阴影 */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-card: 0 2px 8px rgba(11,42,74,.08);
  --shadow-card-hover: 0 8px 24px rgba(11,42,74,.14);
  --shadow-pop: 0 8px 24px rgba(11,42,74,.14);
}

/* --------------------------------------------------------------------------
   2. Reset 与基础元素
   -------------------------------------------------------------------------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

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

body {
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-text);
  background-color: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.no-scroll {
  overflow: hidden;
}

a {
  color: var(--c-primary);
  text-decoration: none;
  transition: color .2s ease;
}

a:hover {
  color: var(--c-primary-dark);
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

input,
select,
textarea {
  font-family: inherit;
}

:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
}

::selection {
  background: var(--c-primary);
  color: #fff;
}

/* --------------------------------------------------------------------------
   3. 容器与通用排版
   -------------------------------------------------------------------------- */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

h1 {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--c-text);
}

h2 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--c-text);
}

h3 {
  font-size: 22px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--c-text);
}

h4 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--c-text);
}

p {
  line-height: 1.7;
  color: var(--c-text);
}

/* --------------------------------------------------------------------------
   4. 按钮 .btn 系列
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-family: var(--font-cn);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  transition: background-color .2s ease, border-color .2s ease, color .2s ease, box-shadow .2s ease, transform .1s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background-color: var(--c-primary);
  border-color: var(--c-primary);
  color: #fff;
}

.btn--primary:hover {
  background-color: var(--c-primary-dark);
  border-color: var(--c-primary-dark);
  color: #fff;
}

.btn--accent {
  background-color: var(--c-accent);
  border-color: var(--c-accent);
  color: #fff;
}

.btn--accent:hover {
  background-color: #E07310;
  border-color: #E07310;
  color: #fff;
}

.btn--outline {
  background-color: transparent;
  border-color: var(--c-primary);
  color: var(--c-primary);
}

.btn--outline:hover {
  background-color: var(--c-primary-light);
  color: var(--c-primary-dark);
}

.btn--white {
  background-color: #fff;
  border-color: #fff;
  color: var(--c-navy);
}

.btn--white:hover {
  background-color: var(--c-primary-light);
  border-color: var(--c-primary-light);
  color: var(--c-navy);
}

.btn--sm {
  min-height: 36px;
  padding: 6px 14px;
  font-size: 13px;
}

.btn--block {
  display: flex;
  width: 100%;
}

.btn[disabled],
.btn.is-disabled {
  background-color: var(--c-line);
  border-color: var(--c-line);
  color: var(--c-steel-light);
  cursor: not-allowed;
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   5. 表单
   -------------------------------------------------------------------------- */
.form {
  display: block;
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form__group {
  margin-bottom: 18px;
}

.form__label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--c-text-2);
  margin-bottom: 6px;
}

.form__label .form__required {
  color: var(--c-danger);
  margin-left: 2px;
}

.form__input,
.form__select,
.form__textarea {
  width: 100%;
  min-height: 44px;
  padding: 10px 14px;
  font-size: 16px; /* ≥16px 防止 iOS 聚焦缩放 */
  font-family: var(--font-cn);
  line-height: 1.5;
  color: var(--c-text);
  background-color: var(--c-bg-white);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  transition: border-color .2s ease, box-shadow .2s ease;
}

.form__textarea {
  min-height: 110px;
  resize: vertical;
}

.form__input::placeholder,
.form__textarea::placeholder {
  color: var(--c-steel-light);
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(20,102,184,.15);
}

.form__select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%235A6B7B' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.form__group.is-invalid .form__input,
.form__group.is-invalid .form__select,
.form__group.is-invalid .form__textarea,
.form__input.is-invalid,
.form__select.is-invalid,
.form__textarea.is-invalid {
  border-color: var(--c-danger);
}

.form__group.is-invalid .form__input:focus,
.form__group.is-invalid .form__textarea:focus,
.form__input.is-invalid:focus,
.form__textarea.is-invalid:focus {
  box-shadow: 0 0 0 3px rgba(214,69,69,.15);
}

.form__error {
  color: var(--c-danger);
  font-size: 13px;
  margin-top: 4px;
  line-height: 1.5;
}

.form__hint {
  font-size: 13px;
  color: var(--c-steel-light);
  margin-top: 4px;
  line-height: 1.5;
}

.form__actions {
  margin-top: 24px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   6. 表格基础
   -------------------------------------------------------------------------- */
.table__wrap {
  width: 100%;
  overflow-x: auto;
  background: var(--c-bg-white);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 640px;
}

.table th,
.table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--c-line);
  vertical-align: middle;
}

.table thead th {
  background: var(--c-navy);
  color: #fff;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: .02em;
  white-space: nowrap;
}

.table tbody tr:last-child td {
  border-bottom: 0;
}

.table tbody tr:nth-child(even) {
  background: #F8FAFC;
}

.table tbody tr:hover {
  background: var(--c-primary-light);
}

/* --------------------------------------------------------------------------
   7. 提示条 .alert
   -------------------------------------------------------------------------- */
.alert {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 20px;
}

.alert--ok {
  background: #EAF7F0;
  border: 1px solid rgba(31,160,90,.35);
  color: #157A45;
}

.alert--err {
  background: #FDF0F0;
  border: 1px solid rgba(214,69,69,.35);
  color: #B33838;
}

.alert--info {
  background: var(--c-primary-light);
  border: 1px solid rgba(20,102,184,.35);
  color: var(--c-primary-dark);
}

.alert--warn {
  background: #FDF6E8;
  border: 1px solid rgba(232,163,61,.4);
  color: #B0761B;
}

/* --------------------------------------------------------------------------
   8. 富文本 .prose
   -------------------------------------------------------------------------- */
.prose {
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-text);
}

.prose p {
  margin-bottom: 16px;
  color: var(--c-text);
}

.prose h3 {
  margin: 28px 0 12px;
  padding-left: 12px;
  border-left: 4px solid var(--c-primary);
}

.prose h4 {
  margin: 22px 0 10px;
}

.prose ul {
  margin: 0 0 16px;
  padding-left: 20px;
  list-style: disc;
}

.prose ul li {
  margin-bottom: 6px;
  line-height: 1.8;
}

.prose ol {
  margin: 0 0 16px;
  padding-left: 20px;
  list-style: decimal;
}

.prose ol li {
  margin-bottom: 6px;
  line-height: 1.8;
}

/* 注意：这里不要写 color。后台富文本给文字上色时输出的是
 * <span style="color:…"><strong>文字</strong></span>，
 * 一旦给 strong 指定固定颜色，就会盖掉父级 span 的行内颜色，
 * 导致后台设置的字体颜色在前台始终显示为深色（曾出现的问题）。
 * 让 strong 只负责加粗，颜色一律继承（未上色时即 .prose 的正文色）。 */
.prose li strong,
.prose p strong {
  font-weight: 600;
}

.prose a {
  color: var(--c-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose img {
  border-radius: var(--radius-md);
  margin: 16px 0;
}

.prose blockquote {
  margin: 16px 0;
  padding: 12px 16px;
  border-left: 4px solid var(--c-primary);
  background: var(--c-primary-light);
  color: var(--c-text-2);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* 富文本输出兼容（后台产品详情等，Quill / wangEditor） */
.prose h1 {
  font-size: 26px;
  margin: 24px 0 12px;
  color: var(--c-navy);
}
.prose h2 {
  font-size: 22px;
  margin: 22px 0 10px;
  color: var(--c-navy);
}
/* 富文本表格（wangEditor 输出，含表头与合并单元格） */
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
  font-size: 15px;
}
.prose table th,
.prose table td {
  border: 1px solid var(--c-line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}
.prose table th {
  background: var(--c-bg);
  font-weight: 600;
  color: var(--c-navy);
}
.prose table p { margin: 0 0 4px; }
.prose table p:last-child { margin-bottom: 0; }
.prose li[data-list="bullet"] {
  list-style: none;
  position: relative;
}
.prose li[data-list="bullet"]::before {
  content: '•';
  position: absolute;
  left: -1.1em;
  color: var(--c-primary);
}
.prose .ql-align-center { text-align: center; }
.prose .ql-align-right { text-align: right; }
.prose .ql-align-justify { text-align: justify; }
.prose .ql-indent-1 { margin-left: 2.5em; }
.prose .ql-indent-2 { margin-left: 5em; }
.prose .ql-indent-3 { margin-left: 7.5em; }
.prose .ql-indent-4 { margin-left: 10em; }
.prose .ql-indent-5 { margin-left: 12.5em; }
.prose .ql-indent-6 { margin-left: 15em; }
.prose .ql-indent-7 { margin-left: 17.5em; }
.prose .ql-indent-8 { margin-left: 20em; }

/* --------------------------------------------------------------------------
   9. 空状态
   -------------------------------------------------------------------------- */
.empty {
  text-align: center;
  padding: 56px 24px;
  background: var(--c-bg-white);
  border: 1px dashed var(--c-line);
  border-radius: var(--radius-md);
}

.empty__icon {
  font-size: 42px;
  line-height: 1;
  margin-bottom: 12px;
  color: var(--c-steel-light);
}

.empty__text {
  font-size: 15px;
  color: var(--c-steel);
}

.empty__sub {
  font-size: 13px;
  color: var(--c-steel-light);
  margin-top: 6px;
}

/* --------------------------------------------------------------------------
   10. 工具类
   -------------------------------------------------------------------------- */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-40 { margin-top: 40px; }
.mt-56 { margin-top: 56px; }
.mt-80 { margin-top: 80px; }

.mb-8  { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.mb-40 { margin-bottom: 40px; }

.hidden {
  display: none !important;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}