/* ============================================
   手账 To Do — 落地页样式
   手账风格：牛皮纸质感 + 和纸胶带 + 手写字体
   ============================================ */

/* ---------- 基础重置 ---------- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 手账配色 */
    --paper: #faf5ec;           /* 牛皮纸底色 */
    --paper-dark: #f0e8d6;      /* 深牛皮纸 */
    --paper-light: #fefcf7;     /* 浅纸 */
    --ink: #4a3728;             /* 墨水棕 */
    --ink-light: #7a6655;       /* 浅墨水 */
    --accent: #e8845f;          /* 朱砂橙 */
    --accent-light: #f5b041;    /* 暖黄 */
    --green: #82b89a;           /* 抹茶绿 */
    --blue: #6fa3b5;            /* 鸭蛋蓝 */
    --pink: #e8a0a0;            /* 樱花粉 */
    --tape-yellow: rgba(245, 200, 80, 0.45);
    --tape-pink: rgba(232, 160, 160, 0.4);
    --tape-green: rgba(130, 184, 154, 0.35);
    --shadow-soft: 0 4px 20px rgba(74, 55, 40, 0.1);
    --shadow-card: 0 8px 30px rgba(74, 55, 40, 0.12);
    --shadow-hover: 0 12px 40px rgba(74, 55, 40, 0.18);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, sans-serif;
    color: var(--ink);
    background: var(--paper);
    line-height: 1.6;
    overflow-x: hidden;
    /* 纸质纹理背景 */
    background-image:
        radial-gradient(circle at 20% 30%, rgba(232, 132, 95, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(130, 184, 154, 0.03) 0%, transparent 50%),
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100' viewBox='0 0 100 100'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.29 0 0 0 0 0.22 0 0 0 0 0.16 0 0 0 0.04 0'/%3E%3C/filter%3E%3Crect width='100' height='100' filter='url(%23noise)'/%3E%3C/svg%3E");
}

a {
    text-decoration: none;
    color: inherit;
}

/* ---------- 通用按钮 ---------- */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    background: var(--ink);
    color: var(--paper-light);
    border: none;
    border-radius: 50px;
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(74, 55, 40, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(74, 55, 40, 0.35);
    background: var(--accent);
}

.btn-primary .btn-arrow {
    transition: transform 0.3s ease;
}

.btn-primary:hover .btn-arrow {
    transform: translateX(4px);
}

.btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    background: transparent;
    color: var(--ink);
    border: 2px solid var(--ink);
    border-radius: 50px;
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-ghost:hover {
    background: var(--ink);
    color: var(--paper-light);
    transform: translateY(-2px);
}

.btn-large {
    padding: 16px 36px;
    font-size: 16px;
}

.highlight {
    color: var(--accent);
    font-family: 'Caveat', cursive;
    font-weight: 700;
    position: relative;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    right: 0;
    height: 8px;
    background: var(--tape-yellow);
    z-index: -1;
    border-radius: 4px;
}

/* ---------- 和纸胶带 ---------- */
.washi-tape {
    position: absolute;
    height: 32px;
    opacity: 0.85;
    z-index: 5;
}

.tape-1 {
    width: 120px;
    background: var(--tape-yellow);
    transform: rotate(-8deg);
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.tape-2 {
    width: 100px;
    background: var(--tape-pink);
    transform: rotate(12deg);
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

/* ---------- 贴纸 ---------- */
.sticker {
    position: absolute;
    font-size: 28px;
    z-index: 5;
    animation: float 4s ease-in-out infinite;
}

.sticker-star { top: 15%; right: 10%; animation-delay: 0s; }
.sticker-coffee { bottom: 20%; left: 5%; animation-delay: 1s; }
.sticker-leaf { top: 60%; right: 3%; animation-delay: 2s; font-size: 24px; }

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(-5deg); }
    50% { transform: translateY(-10px) rotate(5deg); }
}

/* ============ 导航栏 ============ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(250, 245, 236, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(74, 55, 40, 0.08);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'Noto Serif SC', serif;
    font-size: 22px;
    font-weight: 700;
    color: var(--ink);
}

.logo-icon {
    font-size: 28px;
}

.logo-accent {
    color: var(--accent);
    font-family: 'Caveat', cursive;
    font-size: 26px;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    font-size: 15px;
    color: var(--ink-light);
    transition: color 0.3s;
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s;
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-actions .btn-ghost {
    padding: 8px 20px;
    font-size: 14px;
    border-width: 1.5px;
}

.nav-actions .btn-primary {
    padding: 8px 20px;
    font-size: 14px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--ink);
    transition: all 0.3s;
}

/* ============ Hero 区 ============ */
.hero {
    min-height: 100vh;
    padding: 120px 32px 80px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-decor {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.hero-decor .tape-1 {
    top: 100px;
    left: 8%;
}

.hero-decor .tape-2 {
    top: 140px;
    right: 12%;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 10;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--tape-yellow);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease;
}

.hero-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 56px;
    font-weight: 700;
    line-height: 1.25;
    color: var(--ink);
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease;
}

.hero-title .highlight {
    font-size: 68px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--ink-light);
    line-height: 1.8;
    margin-bottom: 36px;
    animation: fadeInUp 1s ease;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    animation: fadeInUp 1.2s ease;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 24px;
    animation: fadeInUp 1.4s ease;
}

.stat-num {
    font-family: 'Caveat', cursive;
    font-size: 36px;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

.stat-label {
    font-size: 13px;
    color: var(--ink-light);
    margin-top: 4px;
}

.stat-divider {
    width: 1px;
    height: 36px;
    background: rgba(74, 55, 40, 0.15);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---- Hero 右侧手账本预览 ---- */
.hero-visual {
    position: relative;
    animation: fadeIn 1.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.notebook {
    position: relative;
    background: var(--paper-light);
    border-radius: 4px;
    box-shadow: var(--shadow-card);
    transform: rotate(2deg);
    transition: transform 0.4s ease;
    max-width: 420px;
    margin: 0 auto;
}

.notebook:hover {
    transform: rotate(0deg) translateY(-4px);
}

.notebook-binding {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 6px;
    background: linear-gradient(to bottom, var(--ink) 0%, var(--ink-light) 50%, var(--ink) 100%);
    border-radius: 4px 0 0 4px;
}

/* 装订孔效果 */
.notebook-binding::before,
.notebook-binding::after {
    content: '';
    position: absolute;
    left: 2px;
    width: 2px;
    height: 2px;
    background: var(--paper-dark);
    border-radius: 50%;
    box-shadow:
        0 40px 0 var(--paper-dark),
        0 80px 0 var(--paper-dark),
        0 120px 0 var(--paper-dark),
        0 160px 0 var(--paper-dark),
        0 200px 0 var(--paper-dark),
        0 240px 0 var(--paper-dark),
        0 280px 0 var(--paper-dark),
        0 320px 0 var(--paper-dark),
        0 360px 0 var(--paper-dark),
        0 400px 0 var(--paper-dark),
        0 440px 0 var(--paper-dark),
        0 480px 0 var(--paper-dark);
}

.notebook-page {
    padding: 32px 32px 32px 44px;
}

.notebook-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px dashed rgba(74, 55, 40, 0.15);
}

.notebook-date {
    font-family: 'Patrick Hand', cursive;
    font-size: 15px;
    color: var(--ink-light);
}

.notebook-weather {
    font-size: 14px;
    color: var(--ink-light);
}

.notebook-title {
    font-family: 'Caveat', cursive;
    font-size: 32px;
    color: var(--ink);
    margin-bottom: 20px;
}

.todo-preview {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.todo-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background: rgba(240, 232, 214, 0.3);
    border-radius: 8px;
    transition: all 0.3s;
}

.todo-item:hover {
    background: rgba(240, 232, 214, 0.6);
    transform: translateX(4px);
}

.todo-check {
    width: 22px;
    height: 22px;
    border: 2px solid var(--ink-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 13px;
    color: var(--paper-light);
    transition: all 0.3s;
}

.todo-item.done .todo-check {
    background: var(--green);
    border-color: var(--green);
}

.todo-item.done .todo-text {
    text-decoration: line-through;
    color: var(--ink-light);
    opacity: 0.6;
}

.todo-text {
    font-size: 15px;
    color: var(--ink);
    flex: 1;
}

.todo-tag {
    font-size: 12px;
    padding: 2px 10px;
    border-radius: 12px;
    font-weight: 500;
}

.tag-work { background: var(--tape-yellow); color: var(--ink); }
.tag-life { background: var(--tape-pink); color: var(--ink); }
.tag-hobby { background: var(--tape-green); color: var(--ink); }

.notebook-footer {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 2px dashed rgba(74, 55, 40, 0.15);
    text-align: center;
}

.notebook-quote {
    font-family: 'Caveat', cursive;
    font-size: 20px;
    color: var(--accent);
}

.notebook-tape {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%) rotate(-3deg);
    width: 80px;
    height: 24px;
    background: var(--tape-green);
    opacity: 0.7;
}

/* ---- 滚动提示 ---- */
.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    font-size: 13px;
    color: var(--ink-light);
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--ink-light);
    border-bottom: 2px solid var(--ink-light);
    transform: rotate(45deg);
    margin: 8px auto 0;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-8px); }
}

/* ============ 通用 Section ============ */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--tape-yellow);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
    margin-bottom: 16px;
}

.section-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 40px;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 16px;
}

.section-title .highlight {
    font-size: 48px;
}

.section-desc {
    font-size: 17px;
    color: var(--ink-light);
}

/* ============ 功能展示区 ============ */
.features {
    padding: 100px 32px;
    background: var(--paper-light);
    position: relative;
}

.features-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    background: var(--paper);
    border-radius: 16px;
    padding: 36px 28px;
    position: relative;
    transition: all 0.4s ease;
    border: 1px solid rgba(74, 55, 40, 0.06);
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

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

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
    display: inline-block;
    transition: transform 0.3s;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(-5deg);
}

.feature-card h3 {
    font-family: 'Noto Serif SC', serif;
    font-size: 22px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 15px;
    color: var(--ink-light);
    line-height: 1.7;
}

.feature-card-tag {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 4px 12px;
    background: var(--tape-pink);
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    color: var(--ink);
}

/* ============ 预览展示区 ============ */
.preview {
    padding: 100px 32px;
    position: relative;
}

.preview-showcase {
    max-width: 1100px;
    margin: 0 auto;
}

.preview-mockup {
    position: relative;
}

.mockup-window {
    background: var(--paper-light);
    border-radius: 16px;
    box-shadow: var(--shadow-hover);
    overflow: hidden;
    border: 1px solid rgba(74, 55, 40, 0.08);
}

.mockup-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 20px;
    background: var(--paper-dark);
    border-bottom: 1px solid rgba(74, 55, 40, 0.08);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot-red { background: #e8845f; }
.dot-yellow { background: #f5b041; }
.dot-green { background: #82b89a; }

.mockup-url {
    margin-left: 16px;
    font-size: 13px;
    color: var(--ink-light);
    font-family: 'Patrick Hand', cursive;
}

.mockup-content {
    display: grid;
    grid-template-columns: 220px 1fr;
    min-height: 520px;
}

.app-sidebar {
    background: var(--paper);
    padding: 24px 16px;
    border-right: 1px solid rgba(74, 55, 40, 0.08);
}

.app-sidebar-item {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 14px;
    color: var(--ink-light);
    cursor: pointer;
    transition: all 0.3s;
    margin-bottom: 4px;
}

.app-sidebar-item:hover {
    background: rgba(240, 232, 214, 0.5);
    color: var(--ink);
}

.app-sidebar-item.active {
    background: var(--ink);
    color: var(--paper-light);
    font-weight: 500;
}

.app-sidebar-divider {
    height: 1px;
    background: rgba(74, 55, 40, 0.1);
    margin: 12px 0;
}

.app-main {
    padding: 32px;
}

.app-header {
    margin-bottom: 28px;
}

.app-header h3 {
    font-family: 'Noto Serif SC', serif;
    font-size: 28px;
    color: var(--ink);
    margin-bottom: 4px;
}

.app-date {
    font-family: 'Patrick Hand', cursive;
    font-size: 15px;
    color: var(--ink-light);
}

.app-todos {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.app-todo {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    background: var(--paper);
    border-radius: 10px;
    transition: all 0.3s;
    border: 1px solid rgba(74, 55, 40, 0.04);
}

.app-todo:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-soft);
}

.app-check {
    width: 24px;
    height: 24px;
    border: 2px solid var(--ink-light);
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    color: transparent;
    transition: all 0.3s;
}

.app-check.checked {
    background: var(--green);
    border-color: var(--green);
    color: var(--paper-light);
}

.app-todo.done .app-todo-text {
    text-decoration: line-through;
    color: var(--ink-light);
    opacity: 0.5;
}

.app-todo-text {
    flex: 1;
    font-size: 15px;
    color: var(--ink);
}

.app-todo-time {
    font-size: 13px;
    color: var(--accent);
    font-weight: 500;
    background: var(--tape-yellow);
    padding: 2px 10px;
    border-radius: 12px;
}

/* ============ 使用步骤 ============ */
.steps {
    padding: 100px 32px;
    background: var(--paper-light);
}

.steps-grid {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

.step-card {
    flex: 1;
    max-width: 300px;
    background: var(--paper);
    border-radius: 16px;
    padding: 36px 28px;
    text-align: center;
    position: relative;
    transition: all 0.4s ease;
    border: 1px solid rgba(74, 55, 40, 0.06);
}

.step-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card);
}

.step-num {
    font-family: 'Caveat', cursive;
    font-size: 56px;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 12px;
    opacity: 0.3;
}

.step-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.step-card h3 {
    font-family: 'Noto Serif SC', serif;
    font-size: 20px;
    color: var(--ink);
    margin-bottom: 10px;
}

.step-card p {
    font-size: 14px;
    color: var(--ink-light);
    line-height: 1.7;
}

.step-arrow {
    font-size: 28px;
    color: var(--ink-light);
    opacity: 0.4;
    flex-shrink: 0;
}

/* ============ 用户评价 ============ */
.testimonials {
    padding: 100px 32px;
}

.testimonials-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.testimonial-card {
    background: var(--paper-light);
    border-radius: 16px;
    padding: 36px 28px;
    position: relative;
    border: 1px solid rgba(74, 55, 40, 0.06);
    transition: all 0.3s;
}

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

.testimonial-quote {
    font-family: 'Noto Serif SC', serif;
    font-size: 64px;
    color: var(--accent);
    line-height: 0.8;
    margin-bottom: 8px;
    opacity: 0.3;
}

.testimonial-card p {
    font-size: 15px;
    color: var(--ink);
    line-height: 1.8;
    margin-bottom: 24px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--paper-light);
    font-size: 18px;
    font-weight: 600;
    font-family: 'Noto Serif SC', serif;
}

.author-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--ink);
}

.author-title {
    font-size: 13px;
    color: var(--ink-light);
}

/* ============ CTA 区 ============ */
.cta {
    padding: 100px 32px;
    background: var(--paper-light);
}

.cta-card {
    max-width: 800px;
    margin: 0 auto;
    background: var(--paper);
    border-radius: 24px;
    padding: 64px 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.cta-decor {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.cta-decor .tape-1 {
    top: 20px;
    left: 10%;
}

.cta-decor .tape-2 {
    top: 30px;
    right: 10%;
}

.cta-decor .sticker-pen {
    top: 15%;
    right: 8%;
    font-size: 32px;
}

.cta-decor .sticker-heart {
    bottom: 15%;
    left: 8%;
    font-size: 28px;
}

.cta-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 36px;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.cta-desc {
    font-size: 17px;
    color: var(--ink-light);
    margin-bottom: 36px;
    position: relative;
    z-index: 1;
}

.cta-form {
    display: flex;
    gap: 12px;
    max-width: 480px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.cta-form input {
    flex: 1;
    padding: 16px 24px;
    border: 2px solid rgba(74, 55, 40, 0.12);
    border-radius: 50px;
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 15px;
    color: var(--ink);
    background: var(--paper-light);
    transition: border-color 0.3s;
    outline: none;
}

.cta-form input:focus {
    border-color: var(--accent);
}

.cta-form input::placeholder {
    color: var(--ink-light);
    opacity: 0.6;
}

.cta-note {
    margin-top: 20px;
    font-size: 13px;
    color: var(--ink-light);
    position: relative;
    z-index: 1;
}

/* ============ FAQ ============ */
.faq {
    padding: 100px 32px;
}

.faq-list {
    max-width: 760px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background: var(--paper-light);
    border-radius: 14px;
    border: 1px solid rgba(74, 55, 40, 0.06);
    overflow: hidden;
    transition: all 0.3s;
}

.faq-item:hover {
    box-shadow: var(--shadow-soft);
}

.faq-question {
    width: 100%;
    padding: 22px 28px;
    background: none;
    border: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 16px;
    font-weight: 500;
    color: var(--ink);
    text-align: left;
    transition: all 0.3s;
}

.faq-question:hover {
    color: var(--accent);
}

.faq-icon {
    font-size: 22px;
    color: var(--accent);
    transition: transform 0.3s;
    flex-shrink: 0;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.active .faq-answer {
    max-height: 200px;
    padding: 0 28px 22px;
}

.faq-answer p {
    font-size: 15px;
    color: var(--ink-light);
    line-height: 1.8;
}

/* ============ Footer ============ */
.footer {
    background: var(--ink);
    color: var(--paper-dark);
    padding: 64px 32px 32px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(250, 245, 236, 0.1);
}

.footer-brand .nav-logo {
    color: var(--paper);
    margin-bottom: 12px;
}

.footer-tagline {
    font-family: 'Caveat', cursive;
    font-size: 22px;
    color: var(--accent-light);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--paper);
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    font-size: 14px;
    color: rgba(250, 245, 236, 0.6);
    margin-bottom: 10px;
    transition: color 0.3s;
}

.footer-col a:hover {
    color: var(--accent-light);
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 24px;
    text-align: center;
    font-size: 13px;
    color: rgba(250, 245, 236, 0.4);
}

/* ============ 响应式 ============ */
@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }

    .hero-title {
        font-size: 42px;
    }

    .hero-title .highlight {
        font-size: 52px;
    }

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

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

    .hero-visual {
        order: -1;
    }

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

    .steps-grid {
        flex-direction: column;
        gap: 16px;
    }

    .step-arrow {
        transform: rotate(90deg);
    }

    .mockup-content {
        grid-template-columns: 180px 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .nav-actions {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: 100px 20px 60px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-title .highlight {
        font-size: 44px;
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-cta .btn-primary,
    .hero-cta .btn-ghost {
        width: 100%;
        justify-content: center;
    }

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

    .section-title {
        font-size: 32px;
    }

    .section-title .highlight {
        font-size: 38px;
    }

    .cta-card {
        padding: 48px 24px;
    }

    .cta-title {
        font-size: 28px;
    }

    .cta-form {
        flex-direction: column;
    }

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

    .app-sidebar {
        display: none;
    }

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

@media (max-width: 480px) {
    .hero-stats {
        flex-wrap: wrap;
        gap: 16px;
    }

    .stat-divider {
        display: none;
    }

    .nav-container {
        padding: 12px 20px;
    }

    .logo-text {
        font-size: 18px;
    }
}