/*
Theme Name: 创否科技
Theme URI: https://www.ywcfkj.com
Author: 义乌创否网络科技有限公司
Author URI: https://www.ywcfkj.com
Description: 创否科技企业官网主题 v1.4.0，采用现代极简科技视觉（B方案）。明亮蓝白科技主色调：白色/浅蓝底 + 品牌蓝 #2563EB + 天蓝 + 薄荷青，大留白、轻卡片、专业大气。支持首页全板块自定义、响应式布局、后台可视化编辑。含文章中心（企业介绍/技术探讨/生活分享/操作教程）。
Version: 1.4.0
Requires at least: 5.8
Tested up to: 6.5
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: chuangfou-tech
Tags: one-column, two-columns, right-sidebar, custom-logo, custom-menu, featured-images, threaded-comments, translation-ready, custom-colors, custom-header, footer-widgets, blog
*/

/* ============================================
   CSS Variables - 配色方案（B方案：现代极简科技 · 明亮蓝白）
   品牌蓝 #2563EB + 天蓝 #0EA5E9 + 薄荷青 + 白色/浅蓝底
   ============================================ */
:root {
    --color-primary: #111827;
    --color-primary-dark: #0b1120;
    --color-primary-light: #1f2937;
    --color-accent: #2563eb;
    --color-accent-light: #3b82f6;
    --color-accent-dark: #1d4ed8;
    --color-brand: #0057ff;
    --color-teal: #2dd4bf;
    --color-white: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;

    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    --font-heading: var(--font-family);

    --container-width: 1200px;
    --section-padding: 96px 0;
    --transition: all 0.3s ease;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.07);
    --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.10);
    --shadow-xl: 0 24px 48px rgba(15, 23, 42, 0.14);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

/* ============================================
   Reset & Base
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.75;
    color: var(--color-gray-600);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

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

ul, ol {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-gray-800);
    margin-bottom: 16px;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.15rem; }
h5 { font-size: 1.05rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 16px;
}

/* ============================================
   Utility Classes
   ============================================ */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: var(--section-padding);
}

.section-title {
    text-align: center;
    margin-bottom: 56px;
}

.section-title h2 {
    font-size: 2.1rem;
    color: var(--color-gray-800);
    margin-bottom: 14px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    display: block;
    width: 48px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-brand), var(--color-teal));
    margin: 18px auto 0;
    border-radius: 2px;
}

.section-title p {
    color: var(--color-gray-400);
    font-size: 1.05rem;
    max-width: 620px;
    margin: 0 auto;
}

.btn {
    position: relative;
    display: inline-block;
    padding: 13px 34px;
    font-size: 0.98rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-align: center;
    line-height: 1.5;
    letter-spacing: 0.01em;
    overflow: hidden;
    isolation: isolate;
}

/* 按钮 hover 光效：斜向微光，突出"变色"反馈但不影响可读性（低透明度，避免"变白"） */
.btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: -80%;
    width: 55%;
    height: 100%;
    z-index: 1;
    background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.16), transparent);
    transform: skewX(-20deg);
    transition: left 0.6s ease;
    pointer-events: none;
}

.btn:hover::after {
    left: 130%;
}

.btn > * {
    position: relative;
    z-index: 2;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent), var(--color-brand));
    color: var(--color-white);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.28);
}

/* hover：渐变加深一档（2563eb→1d4ed8 方向）+ 光晕 + 上浮，白字始终清晰 */
.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-accent-dark), #0046d0);
    box-shadow: 0 10px 26px rgba(37, 99, 235, 0.40);
    transform: translateY(-2px);
    color: var(--color-white);
}

/* 描边按钮：默认蓝色描边 + 蓝色文字（浅色底上清晰醒目） */
.btn-outline {
    background: transparent;
    color: var(--color-accent);
    border-color: rgba(37, 99, 235, 0.55);
}

/* hover：填充品牌蓝渐变 + 白字 + 上浮；离开自动恢复描边样式 */
.btn-outline:hover {
    background: linear-gradient(135deg, var(--color-accent), var(--color-brand));
    color: var(--color-white);
    border-color: transparent;
    box-shadow: 0 8px 22px rgba(37, 99, 235, 0.30);
    transform: translateY(-2px);
}

.btn-light {
    background: var(--color-white);
    color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.btn-light:hover {
    background: var(--color-gray-50);
    transform: translateY(-2px);
}

/* ============================================
   Header / Navigation（浅色悬浮导航）
   ============================================ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    transition: var(--transition);
    border-bottom: 1px solid rgba(15, 23, 42, 0.06);
}

/* 登录后 admin bar 兼容：导航栏下移避开工具栏 */
body.admin-bar .site-header {
    top: 32px;
}

@media screen and (max-width: 782px) {
    body.admin-bar .site-header {
        top: 46px;
    }
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow-md);
}

.header-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.site-branding {
    display: flex;
    align-items: center;
    gap: 10px;
}

.site-brand-link {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    line-height: 1;
}

.site-logo-mark {
    height: 42px;
    width: auto;
    flex-shrink: 0;
}

.site-brand-text {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 7.2px;
    line-height: 1;
    max-width: 260px;
}

.site-brand-name {
    font-size: 1.02rem;
    font-weight: 700;
    color: var(--color-gray-800);
    letter-spacing: 0.9em;
    text-align: center;
    margin-right: -0.9em;
    white-space: nowrap;
}

.site-brand-slogan {
    font-size: 0.7rem;
    color: var(--color-gray-400);
    letter-spacing: 0.04em;
    text-align: center;
    white-space: nowrap;
}

.site-logo {
    max-height: 50px;
    width: auto;
}

.site-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-gray-800);
    margin: 0;
    line-height: 1;
}

.site-title a {
    color: var(--color-gray-800);
}

.main-navigation {
    display: flex;
    align-items: center;
    gap: 28px;
}

.main-navigation ul {
    display: flex;
    align-items: center;
    gap: 4px;
}

.main-navigation li {
    position: relative;
}

.main-navigation a {
    display: block;
    padding: 9px 16px;
    color: var(--color-gray-600);
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.main-navigation a:hover,
.main-navigation .current-menu-item > a,
.main-navigation .current_page_item > a {
    color: var(--color-accent);
    background: rgba(37, 99, 235, 0.07);
}

.header-cta .btn {
    padding: 9px 24px;
    font-size: 0.9rem;
}

/* 导航内主按钮：强制白字 + 渐变底，覆盖 .main-navigation a 的字色/底色；
   hover 渐变加深一档，避免被父级链接 hover 样式覆盖成浅色（变白） */
.main-navigation .header-cta .btn,
.main-navigation .header-cta .btn:hover,
.main-navigation .header-cta .btn:focus,
.main-navigation .header-cta .btn:active {
    color: var(--color-white);
    background: linear-gradient(135deg, var(--color-accent), var(--color-brand));
    border-color: transparent;
}

.main-navigation .header-cta .btn:hover {
    background: linear-gradient(135deg, var(--color-accent-dark), #0046d0);
    box-shadow: 0 10px 22px rgba(37, 99, 235, 0.38);
}

/* 小按钮去掉斜向扫光，避免 hover 时出现"变白"观感 */
.main-navigation .header-cta .btn::after {
    display: none;
}

/* ============================================
   Dropdown Submenu（二级下拉菜单）
   ============================================ */
.main-navigation .menu-item-has-children > a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* 父级菜单小箭头（桌面端 hover 时翻转） */
.main-navigation .menu-item-has-children > a::after {
    content: '';
    width: 6px;
    height: 6px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg) translateY(-2px);
    transition: transform 0.3s ease;
    opacity: 0.65;
}

.main-navigation .menu-item-has-children:hover > a::after {
    transform: rotate(225deg) translateY(-1px);
}

/* 下拉浮层：白色毛玻璃卡片 */
.main-navigation .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--color-gray-100);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 8px;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: var(--transition);
    z-index: 100;
}

.main-navigation li:hover > .sub-menu,
.main-navigation li:focus-within > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.main-navigation .sub-menu .menu-item a {
    padding: 10px 14px;
    font-size: 0.9rem;
    white-space: nowrap;
    border-radius: var(--radius-sm);
}

.main-navigation .sub-menu .menu-item a:hover {
    background: rgba(37, 99, 235, 0.07);
    color: var(--color-accent);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    flex-direction: column;
    gap: 5px;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-gray-800);
    transition: var(--transition);
    border-radius: 1px;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   Hero Section（明亮蓝白首屏）
   ============================================ */
.hero-section {
    position: relative;
    min-height: 92vh;
    display: flex;
    align-items: center;
    background: linear-gradient(140deg, #eff6ff 0%, #f8fafc 45%, #dbeafe 100%);
    overflow: hidden;
    padding-top: 72px;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 15% 40%, rgba(37, 99, 235, 0.10) 0%, transparent 50%),
        radial-gradient(circle at 85% 25%, rgba(14, 165, 233, 0.10) 0%, transparent 45%),
        radial-gradient(circle at 65% 85%, rgba(6, 182, 212, 0.07) 0%, transparent 40%);
}

.hero-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(37, 99, 235, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.05) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.7), transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.7), transparent 80%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 64px;
    align-items: center;
}

.hero-text h1 {
    font-size: 3.1rem;
    color: var(--color-gray-900);
    margin-bottom: 22px;
    line-height: 1.18;
    letter-spacing: -0.01em;
}

.hero-text h1 span {
    background: linear-gradient(135deg, #2563eb, #06b6d4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text p {
    font-size: 1.15rem;
    color: var(--color-gray-500);
    margin-bottom: 36px;
    line-height: 1.9;
    max-width: 540px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Hero 双按钮联动：鼠标悬停其中一枚时，另一枚切换为"未选中"样式
   （描边次级按钮，与「免费咨询」默认观感一致），而不是仅变淡；
   鼠标离开按钮组后两枚都恢复默认，不会一直停留在选中态 */
.hero-buttons:hover .btn:not(:hover) {
    background: transparent;
    color: var(--color-accent);
    border-color: rgba(37, 99, 235, 0.55);
    box-shadow: none;
    transform: none;
}

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-visual img {
    width: 100%;
    max-width: 520px;
    border-radius: var(--radius-xl);
    box-shadow: 0 30px 60px rgba(37, 99, 235, 0.18);
}

.hero-visual-placeholder {
    width: 100%;
    max-width: 480px;
    aspect-ratio: 1;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(6, 182, 212, 0.06));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    border: 1px solid rgba(37, 99, 235, 0.15);
    backdrop-filter: blur(10px);
}

.hero-visual-placeholder::before {
    content: '';
    position: absolute;
    width: 80%;
    height: 80%;
    border: 2px dashed rgba(37, 99, 235, 0.25);
    border-radius: var(--radius-lg);
    animation: rotate 30s linear infinite;
}

.hero-visual-icon {
    font-size: 6rem;
    color: rgba(37, 99, 235, 0.35);
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.hero-visual-placeholder {
    animation: float 6s ease-in-out infinite;
}

/* ============================================
   Stats Section（深蓝统计条）
   ============================================ */
.stats-section {
    background: linear-gradient(120deg, #2563eb 0%, #0ea5e9 100%);
    padding: 64px 0;
    position: relative;
    overflow: hidden;
}

.stats-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.16) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.stats-grid {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.stat-item {
    text-align: center;
    padding: 16px 20px;
    position: relative;
}

.stat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 20%;
    bottom: 20%;
    width: 1px;
    background: rgba(255, 255, 255, 0.08);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-white);
    line-height: 1;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #ffffff, #a5f3fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.98rem;
    color: rgba(255, 255, 255, 0.85);
    font-weight: 500;
}

/* ============================================
   Services Section（蓝白科技背景 + 白色卡片）
   ============================================ */
.services-section {
    position: relative;
    background-color: #f8fafc;
    background-image: url('assets/images/services-bg.jpg');
    background-size: cover;
    background-position: center;
}

.services-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(248, 250, 252, 0.9) 0%, rgba(248, 250, 252, 0.86) 100%);
    z-index: 1;
}

.services-section .container {
    position: relative;
    z-index: 2;
}

.services-section .section-title h2 {
    color: var(--color-gray-900);
}

.services-section .section-title p {
    color: var(--color-gray-500);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.service-card {
    background: rgba(255, 255, 255, 0.86);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-radius: var(--radius-lg);
    padding: 44px 32px;
    transition: var(--transition);
    border: 1px solid rgba(37, 99, 235, 0.12);
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.07);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-brand), var(--color-teal));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.service-card:hover {
    transform: translateY(-8px);
    background: var(--color-white);
    border-color: rgba(37, 99, 235, 0.25);
    box-shadow: 0 22px 44px rgba(37, 99, 235, 0.14);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    width: 96px;
    height: 96px;
    border-radius: 24px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(6, 182, 212, 0.1));
    border: 1px solid rgba(37, 99, 235, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 26px;
    font-size: 2.7rem;
    line-height: 1;
    box-shadow: 0 10px 24px rgba(37, 99, 235, 0.12);
    transition: var(--transition);
}

.service-card:hover .service-icon {
    transform: scale(1.08) translateY(-2px);
    box-shadow: 0 16px 34px rgba(37, 99, 235, 0.22);
}

.service-card h3 {
    font-size: 1.28rem;
    color: var(--color-gray-800);
    margin-bottom: 14px;
}

.service-card p {
    color: var(--color-gray-500);
    font-size: 0.96rem;
    margin-bottom: 0;
    line-height: 1.8;
}

/* ============================================
   Process Section（蓝白背景 + 横向流程卡片）
   ============================================ */
.process-section {
    position: relative;
    background-color: #f8fafc;
    background-image: url('assets/images/process-bg.jpg');
    background-size: cover;
    background-position: center;
}

.process-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(248, 250, 252, 0.9) 0%, rgba(248, 250, 252, 0.88) 100%);
    z-index: 1;
}

.process-section .container {
    position: relative;
    z-index: 2;
}

.process-section .section-title h2 {
    color: var(--color-gray-900);
}

.process-section .section-title p {
    color: var(--color-gray-500);
}

.process-list {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
}

.process-item {
    position: relative;
    padding: 42px 26px;
    background: rgba(255, 255, 255, 0.86);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(37, 99, 235, 0.12);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.07);
    transition: var(--transition);
}

.process-item:hover {
    transform: translateY(-6px);
    background: var(--color-white);
    border-color: rgba(37, 99, 235, 0.25);
    box-shadow: 0 20px 40px rgba(37, 99, 235, 0.14);
}

.process-item:not(:last-child)::after {
    content: '›';
    position: absolute;
    right: -24px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
    color: rgba(6, 182, 212, 0.65);
    text-shadow: 0 0 12px rgba(6, 182, 212, 0.35);
    z-index: 3;
}

.process-number {
    width: 76px;
    height: 76px;
    line-height: 76px;
    margin: 0 auto 24px;
    font-size: 1.75rem;
    font-weight: 800;
    text-align: center;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-brand), var(--color-teal));
    color: var(--color-white);
    box-shadow: 0 10px 26px rgba(37, 99, 235, 0.28);
    transition: var(--transition);
}

.process-item:hover .process-number {
    transform: scale(1.08);
    box-shadow: 0 14px 34px rgba(37, 99, 235, 0.4);
}

.process-content h3 {
    font-size: 1.24rem;
    color: var(--color-gray-800);
    margin-bottom: 12px;
}

.process-content p {
    color: var(--color-gray-500);
    font-size: 0.94rem;
    margin-bottom: 18px;
    line-height: 1.85;
}

.process-deliverables {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.process-tag {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(37, 99, 235, 0.07);
    color: var(--color-accent);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid rgba(37, 99, 235, 0.16);
}

/* ============================================
   Portfolio / Cases Section
   ============================================ */
.portfolio-section {
    background: var(--color-white);
}

.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 44px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 9px 26px;
    border: 1px solid var(--color-gray-200);
    background: var(--color-white);
    color: var(--color-gray-600);
    border-radius: 30px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.filter-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--color-accent), var(--color-brand));
    border-color: transparent;
    color: var(--color-white);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.25);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.portfolio-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--color-gray-100);
}

.portfolio-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.portfolio-image {
    position: relative;
    aspect-ratio: 16/10;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.portfolio-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.portfolio-card:hover .portfolio-image img {
    transform: scale(1.04);
}

.portfolio-image-placeholder {
    color: rgba(255, 255, 255, 0.3);
    font-size: 4rem;
}

.portfolio-category-tag {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 5px 14px;
    background: rgba(255, 255, 255, 0.94);
    color: var(--color-accent);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    backdrop-filter: blur(6px);
    box-shadow: var(--shadow-sm);
}

.portfolio-body {
    padding: 28px 30px 30px;
}

.portfolio-body h3 {
    font-size: 1.2rem;
    color: var(--color-gray-800);
    margin-bottom: 10px;
}

.portfolio-body p {
    color: var(--color-gray-500);
    font-size: 0.92rem;
    margin-bottom: 16px;
    line-height: 1.75;
}

.portfolio-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 18px;
}

.tech-tag {
    padding: 4px 10px;
    background: var(--color-gray-50);
    color: var(--color-gray-600);
    border-radius: 6px;
    font-size: 0.78rem;
    font-weight: 500;
    border: 1px solid var(--color-gray-100);
}

.portfolio-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-accent);
    font-weight: 600;
    font-size: 0.9rem;
}

.portfolio-link:hover {
    gap: 10px;
    color: var(--color-accent-dark);
}

/* ============================================
   About Section
   ============================================ */
.about-section {
    background: var(--color-gray-50);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-text h2 {
    font-size: 2.1rem;
    color: var(--color-gray-800);
    margin-bottom: 22px;
}

.about-text p {
    color: var(--color-gray-600);
    font-size: 1rem;
    line-height: 1.95;
    margin-bottom: 20px;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 30px;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    color: var(--color-gray-700);
    font-weight: 500;
}

.about-feature-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-brand), var(--color-teal));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-size: 0.75rem;
    flex-shrink: 0;
}

.about-visual {
    display: flex;
    justify-content: center;
    position: relative;
}

.about-visual img {
    width: 100%;
    max-width: 500px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    aspect-ratio: 4/3;
    object-fit: cover;
}

.about-visual::after {
    content: '';
    position: absolute;
    width: 140px;
    height: 140px;
    background: linear-gradient(135deg, rgba(0, 87, 255, 0.18), rgba(45, 212, 191, 0.12));
    border-radius: 50%;
    bottom: -20px;
    right: -12px;
    z-index: -1;
}

.about-visual-placeholder {
    width: 100%;
    max-width: 460px;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--color-gray-100), var(--color-gray-200));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.about-visual-placeholder::before {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, rgba(0, 87, 255, 0.18), rgba(45, 212, 191, 0.12));
    border-radius: 50%;
    top: -50px;
    right: -50px;
}

.about-visual-icon {
    font-size: 5rem;
    color: var(--color-gray-400);
    position: relative;
    z-index: 2;
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
    background: linear-gradient(135deg, #2563eb 0%, #0ea5e9 100%);
    padding: 88px 0;
    position: relative;
    overflow: hidden;
    text-align: center;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 25% 50%, rgba(255, 255, 255, 0.16) 0%, transparent 50%),
        radial-gradient(circle at 75% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.cta-content {
    position: relative;
    z-index: 2;
    max-width: 720px;
    margin: 0 auto;
    padding: 0 24px;
}

.cta-content h2 {
    font-size: 2.1rem;
    color: var(--color-white);
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 36px;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
    background: var(--color-gray-900);
    color: rgba(255, 255, 255, 0.65);
    padding: 72px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
    gap: 48px;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px 48px;
}

.footer-col h4 {
    color: var(--color-white);
    font-size: 1.05rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 28px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-teal));
}

.footer-about .footer-logo {
    max-height: 44px;
    width: auto;
    margin-bottom: 16px;
}

.footer-about p {
    font-size: 0.9rem;
    line-height: 1.85;
    margin-bottom: 16px;
    color: rgba(255, 255, 255, 0.55);
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.55);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--color-accent-light);
    padding-left: 4px;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 14px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.55);
    line-height: 1.6;
}

.footer-contact-icon {
    color: var(--color-accent-light);
    font-size: 1rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.footer-qr {
    margin-top: 16px;
    display: flex;
    align-items: center;
    gap: 14px;
}

.footer-qr img {
    width: 96px;
    height: 96px;
    border-radius: var(--radius-md);
    padding: 6px;
    background: var(--color-white);
    object-fit: cover;
}

.footer-qr-label {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.55);
    line-height: 1.6;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 22px 0;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.35);
    max-width: var(--container-width);
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}

/* ============================================
   Inner Pages (Page / Single / Archive)
   ============================================ */
.site-main {
    padding-top: 72px;
    min-height: calc(100vh - 72px);
}

.page-header {
    background: linear-gradient(135deg, #2563eb, #0ea5e9);
    padding: 88px 0 72px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 30% 50%, rgba(255, 255, 255, 0.16) 0%, transparent 50%),
        radial-gradient(circle at 70% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.page-header h1 {
    color: var(--color-white);
    font-size: 2.4rem;
    margin-bottom: 8px;
    position: relative;
    z-index: 2;
}

.page-header .breadcrumb {
    color: rgba(255, 255, 255, 0.55);
    font-size: 0.9rem;
    position: relative;
    z-index: 2;
}

.page-header .breadcrumb a {
    color: rgba(255, 255, 255, 0.75);
}

.page-header .breadcrumb a:hover {
    color: var(--color-white);
}

.content-area {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 72px 24px;
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 48px;
}

.content-area.full-width {
    grid-template-columns: 1fr;
}

.entry-content {
    background: var(--color-white);
    padding: 44px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-gray-100);
    box-shadow: var(--shadow-sm);
}

.entry-content h1, .entry-content h2, .entry-content h3,
.entry-content h4, .entry-content h5, .entry-content h6 {
    color: var(--color-gray-800);
    margin-top: 28px;
}

.entry-content h2 { font-size: 1.55rem; }
.entry-content h3 { font-size: 1.25rem; }

.entry-content p {
    margin-bottom: 18px;
    line-height: 1.95;
}

.entry-content ul, .entry-content ol {
    margin-bottom: 18px;
    padding-left: 24px;
}

.entry-content ul { list-style: disc; }
.entry-content ol { list-style: decimal; }

.entry-content li {
    margin-bottom: 8px;
    line-height: 1.8;
}

.entry-content blockquote {
    border-left: 4px solid var(--color-accent);
    padding: 16px 24px;
    margin: 24px 0;
    background: var(--color-gray-50);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
    color: var(--color-gray-600);
}

.entry-content img {
    border-radius: var(--radius-md);
    margin: 20px 0;
}

.entry-content a {
    text-decoration: underline;
}

.entry-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.entry-content th, .entry-content td {
    padding: 12px 16px;
    border: 1px solid var(--color-gray-200);
    text-align: left;
}

.entry-content th {
    background: var(--color-gray-50);
    font-weight: 600;
    color: var(--color-gray-800);
}

/* Sidebar */
.widget-area {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.widget {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 26px;
    border: 1px solid var(--color-gray-100);
    box-shadow: var(--shadow-sm);
}

.widget-title {
    font-size: 1.05rem;
    color: var(--color-gray-800);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-gray-100);
}

.widget ul li {
    padding: 8px 0;
    border-bottom: 1px solid var(--color-gray-100);
}

.widget ul li:last-child {
    border-bottom: none;
}

.widget a {
    color: var(--color-gray-600);
    font-size: 0.92rem;
}

.widget a:hover {
    color: var(--color-accent);
}

/* Search Form */
.search-form {
    display: flex;
    gap: 0;
}

.search-form input[type="search"] {
    flex: 1;
    padding: 10px 14px;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md) 0 0 var(--radius-md);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);
}

.search-form input[type="search"]:focus {
    border-color: var(--color-accent);
}

.search-form button {
    padding: 10px 18px;
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

.search-form button:hover {
    background: var(--color-accent);
}

/* Posts List (Archive / Search) */
.posts-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.post-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-gray-100);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: grid;
    grid-template-columns: 280px 1fr;
}

.post-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.post-thumbnail {
    aspect-ratio: 16/10;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    overflow: hidden;
}

.post-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.post-content {
    padding: 28px;
    display: flex;
    flex-direction: column;
}

.post-meta {
    display: flex;
    gap: 16px;
    font-size: 0.82rem;
    color: var(--color-gray-400);
    margin-bottom: 10px;
}

.post-content h2 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.post-content h2 a {
    color: var(--color-gray-800);
}

.post-content h2 a:hover {
    color: var(--color-accent);
}

.post-excerpt {
    color: var(--color-gray-500);
    font-size: 0.92rem;
    line-height: 1.75;
    margin-bottom: 16px;
    flex: 1;
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-accent);
    font-weight: 600;
    font-size: 0.9rem;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 44px;
}

.pagination .page-numbers {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--color-white);
    color: var(--color-gray-600);
    font-weight: 600;
    font-size: 0.9rem;
    border: 1px solid var(--color-gray-200);
    transition: var(--transition);
}

.pagination .page-numbers:hover,
.pagination .page-numbers.current {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

/* ============================================
   Article Center（文章中心页 + 归档卡片）
   ============================================ */
.page-header .page-subtitle {
    color: rgba(255, 255, 255, 0.78);
    font-size: 1.02rem;
    margin-bottom: 10px;
    position: relative;
    z-index: 2;
}

.articles-wrap {
    padding: 56px 0 88px;
    background: var(--color-gray-50);
}

/* 分类筛选 chips */
.article-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 40px;
}

.filter-chip {
    display: inline-flex;
    align-items: center;
    padding: 9px 22px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-gray-600);
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: 999px;
    transition: var(--transition);
}

.filter-chip:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.filter-chip.active {
    color: var(--color-white);
    background: linear-gradient(135deg, var(--color-accent), var(--color-brand));
    border-color: transparent;
    box-shadow: 0 6px 18px rgba(37, 99, 235, 0.28);
}

/* 文章卡片网格 */
.article-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.article-card {
    display: flex;
    flex-direction: column;
    background: var(--color-white);
    border: 1px solid var(--color-gray-100);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.article-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.article-card-media {
    display: block;
    aspect-ratio: 16 / 10;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    overflow: hidden;
}

.article-card-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.article-card:hover .article-card-media img {
    transform: scale(1.06);
}

.article-card-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    font-size: 3rem;
    color: rgba(255, 255, 255, 0.3);
}

.article-card-body {
    display: flex;
    flex-direction: column;
    padding: 22px 24px 24px;
    flex: 1;
}

.article-card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.article-card-cat {
    display: inline-block;
    padding: 3px 12px;
    font-size: 0.76rem;
    font-weight: 600;
    color: var(--color-accent);
    background: rgba(37, 99, 235, 0.09);
    border-radius: 999px;
}

.article-card-cat:hover {
    background: rgba(37, 99, 235, 0.16);
}

.article-card-date {
    font-size: 0.8rem;
    color: var(--color-gray-400);
}

.article-card-title {
    font-size: 1.12rem;
    line-height: 1.45;
    margin-bottom: 10px;
}

.article-card-title a {
    color: var(--color-gray-800);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-title a:hover {
    color: var(--color-accent);
}

.article-card-excerpt {
    font-size: 0.88rem;
    color: var(--color-gray-500);
    line-height: 1.75;
    margin-bottom: 16px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-accent);
    font-weight: 600;
    font-size: 0.9rem;
}

.articles-empty {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--color-gray-400);
    padding: 60px 0;
    font-size: 1.05rem;
}

/* 归档页文章卡片：增加分类标签 */
.post-card .post-content .post-meta .article-card-cat {
    align-self: flex-start;
}

/* 404 Page */
.error-404 {
    text-align: center;
    padding: 100px 24px;
}

.error-404 .error-code {
    font-size: 8rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-brand), var(--color-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 20px;
}

.error-404 h1 {
    font-size: 2rem;
    color: var(--color-gray-800);
    margin-bottom: 12px;
}

.error-404 p {
    color: var(--color-gray-500);
    margin-bottom: 30px;
    font-size: 1.05rem;
}

/* Comments */
.comments-area {
    margin-top: 40px;
    background: var(--color-white);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-gray-100);
    box-shadow: var(--shadow-sm);
}

.comments-title {
    font-size: 1.3rem;
    color: var(--color-gray-800);
    margin-bottom: 24px;
}

.comment-list {
    margin-bottom: 30px;
}

.comment-body {
    padding: 20px;
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
}

.comment-author {
    font-weight: 600;
    color: var(--color-gray-800);
    margin-bottom: 4px;
}

.comment-metadata {
    font-size: 0.82rem;
    color: var(--color-gray-400);
    margin-bottom: 10px;
}

.comment-content {
    color: var(--color-gray-600);
    font-size: 0.92rem;
    line-height: 1.75;
}

.comment-reply-link {
    font-size: 0.85rem;
    color: var(--color-accent);
    font-weight: 600;
}

/* ============================================
   联系页表单（覆盖内联变量）
   ============================================ */
.contact-grid .contact-info-item > div > div:first-child,
.contact-grid .contact-info-item > div > div {
    color: var(--color-gray-700);
}

.contact-form-wrapper .contact-form input[type="text"],
.contact-form-wrapper .contact-form input[type="tel"],
.contact-form-wrapper .contact-form input[type="email"],
.contact-form-wrapper .contact-form select,
.contact-form-wrapper .contact-form textarea {
    border-color: var(--color-gray-200);
}

/* ============================================
   Scroll to Top
   ============================================ */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--color-accent);
    transform: translateY(-3px);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 48px;
        padding-top: 40px;
        padding-bottom: 40px;
    }

    .hero-text p {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-visual {
        order: -1;
    }

    .hero-visual img {
        max-width: 400px;
    }

    .hero-visual-placeholder {
        max-width: 340px;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .process-list {
        grid-template-columns: repeat(2, 1fr);
    }

    .process-item:not(:last-child)::after {
        content: none;
    }

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

    .about-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .content-area {
        grid-template-columns: 1fr;
    }

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

/* 导航栏：较窄视口时切换为移动菜单，避免菜单项折行 */
@media (max-width: 920px) {
    .menu-toggle {
        display: flex;
    }

    .main-navigation {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        padding: 24px;
        gap: 0;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--color-gray-100);
        max-height: calc(100vh - 72px);
        overflow-y: auto;
    }

    .main-navigation.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .main-navigation ul {
        flex-direction: column;
        width: 100%;
        gap: 0;
    }

    .main-navigation li {
        width: 100%;
    }

    .main-navigation a {
        padding: 14px 16px;
        border-radius: var(--radius-sm);
        color: var(--color-gray-700);
    }

    .main-navigation a:hover,
    .main-navigation .current-menu-item > a,
    .main-navigation .current_page_item > a {
        color: var(--color-accent);
        background: rgba(37, 99, 235, 0.06);
    }

    /* 移动端：子菜单改为手风琴展开 */
    .main-navigation .sub-menu {
        position: static;
        background: var(--color-gray-50);
        border: none;
        box-shadow: none;
        border-radius: var(--radius-sm);
        padding: 4px 0 6px 14px;
        margin: 2px 0 8px;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }

    .main-navigation .sub-menu.open {
        display: flex;
    }

    .main-navigation .menu-item-has-children.open > a {
        color: var(--color-accent);
        background: rgba(37, 99, 235, 0.06);
    }

    .main-navigation .menu-item-has-children > a::after {
        transform: rotate(45deg) translateY(-2px);
    }

    .main-navigation .menu-item-has-children.open > a::after {
        transform: rotate(225deg) translateY(-1px);
    }

    .main-navigation .sub-menu .menu-item a {
        font-size: 0.9rem;
        padding: 11px 14px;
    }

    .header-cta {
        width: 100%;
        margin-top: 16px;
    }

    .header-cta .btn {
        width: 100%;
    }

    /* 平板宽度下文章网格降为两列 */
    .article-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px 0;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.65rem; }

    .hero-text h1 {
        font-size: 2rem;
    }

    .hero-text p {
        font-size: 1rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .stat-number {
        font-size: 2.3rem;
    }

    .stat-item:not(:last-child)::after {
        display: none;
    }

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

    .process-list {
        grid-template-columns: 1fr;
    }

    .process-item {
        padding: 32px 22px;
    }

    .process-item:not(:last-child)::after {
        content: none;
    }

    .section-title h2 {
        font-size: 1.65rem;
    }

    .cta-content h2 {
        font-size: 1.65rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .entry-content {
        padding: 26px;
    }

    .comments-area {
        padding: 26px;
    }

    .error-404 .error-code {
        font-size: 5rem;
    }

    .scroll-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
    }

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

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

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
    }

    .hero-buttons .btn {
        width: 100%;
    }

    .portfolio-filters {
        gap: 8px;
    }

    .filter-btn {
        padding: 7px 16px;
        font-size: 0.82rem;
    }

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

    .footer-qr {
        flex-direction: column;
        align-items: flex-start;
    }

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

    .article-filters {
        gap: 8px;
    }

    .filter-chip {
        padding: 8px 18px;
        font-size: 0.84rem;
    }
}

/* ============================================
   Accessibility
   ============================================ */
.screen-reader-text {
    border: 0;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute !important;
    width: 1px;
    word-wrap: normal !important;
}

.screen-reader-text:focus {
    background-color: var(--color-gray-100);
    clip: auto !important;
    clip-path: none;
    color: var(--color-gray-700);
    display: block;
    font-size: 0.875rem;
    font-weight: 700;
    height: auto;
    left: 5px;
    line-height: normal;
    padding: 15px 23px 14px;
    text-decoration: none;
    top: 5px;
    width: auto;
    z-index: 100000;
    border-radius: var(--radius-md);
}

/* Skip link */
.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 12px 24px;
    z-index: 10000;
    border-radius: 0 0 var(--radius-md) 0;
    font-weight: 600;
}

.skip-link:focus {
    top: 0;
    color: var(--color-white);
}

/* Print Styles */
@media print {
    .site-header,
    .site-footer,
    .scroll-top,
    .hero-buttons,
    .portfolio-filters {
        display: none !important;
    }

    body {
        color: #000;
        background: #fff;
    }

    a {
        text-decoration: underline;
        color: #000;
    }
}