```css
/* =====================================================
   黑料视频 — 墨纸证据设计系统
   Ink & Paper / Editorial-Investigative Aesthetic
   Palette: Paper #F7F4EC / Ink #161310 / Crimson #E61942 / Marker #F5E76A
   ===================================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    overflow-x: hidden;
    background-color: #F7F4EC;
    background-image: radial-gradient(rgba(22, 19, 16, 0.05) 1px, transparent 1px);
    background-size: 26px 26px;
    color: #161310;
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    counter-reset: sec;
}

::selection {
    background: #E61942;
    color: #F7F4EC;
}

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

/* 全局胶片噪点纹理 */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: radial-gradient(rgba(22, 19, 16, 0.055) 1px, transparent 1px);
    background-size: 32px 32px;
    pointer-events: none;
    z-index: 2147483647;
    opacity: 0.45;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}
::-webkit-scrollbar-track {
    background: #EFEBE0;
}
::-webkit-scrollbar-thumb {
    background: #C9C1B2;
    border: 2px solid #EFEBE0;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #E61942;
}

/* ---------- 核心布局 ---------- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
    position: relative;
    counter-increment: sec;
}

.section:nth-child(even) {
    background: #EFEBE0;
}

/* 内容层级 —— 确保位于水印装饰之上 */
.section > * {
    position: relative;
    z-index: 1;
}

/* 超大档案编号水印 */
.section::after {
    content: '/' counter(sec, decimal-leading-zero);
    position: absolute;
    right: 16px;
    bottom: 8px;
    font-size: 5.2rem;
    font-weight: 900;
    line-height: 1;
    letter-spacing: -0.06em;
    color: rgba(216, 210, 196, 0.45);
    pointer-events: none;
    z-index: 0;
}

.section:nth-child(even)::after {
    color: rgba(201, 193, 178, 0.5);
}

/* ---------- 固定导航 ---------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(247, 244, 236, 0.88);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid #D8D2C4;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 900;
    font-size: 1.22rem;
    text-decoration: none;
    color: #161310;
    letter-spacing: -0.02em;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    background: #E61942;
    color: #F7F4EC;
    position: relative;
    box-shadow: 2px 2px 0 #161310;
}

.logo-icon::after {
    content: '';
    position: absolute;
    inset: 6px;
    border: 1.5px solid rgba(247, 244, 236, 0.55);
    border-radius: 2px;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
}

.main-nav li {
    list-style: none;
}

.main-nav a {
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 600;
    color: #161310;
    transition: color 0.2s ease;
    position: relative;
    padding: 4px 0;
}

.main-nav a:not(.nav-cta)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: #E61942;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.25s ease;
}

.main-nav a:not(.nav-cta):hover {
    color: #E61942;
}

.main-nav a:not(.nav-cta):hover::after {
    transform: scaleX(1);
}

.nav-cta {
    padding: 9px 22px;
    border-radius: 2px;
    color: #F7F4EC !important;
    font-weight: 800;
    background: #E61942;
    box-shadow: 3px 3px 0 #161310;
    transition: all 0.16s ease;
}

.nav-cta:hover {
    transform: translate(1px, 1px);
    box-shadow: 2px 2px 0 #161310;
    color: #F7F4EC !important;
}

/* 汉堡按钮 */
.menu-toggle {
    display: none;
    width: 46px;
    height: 46px;
    border: none;
    background: transparent;
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 0;
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: #161310;
    border-radius: 1px;
    transition: transform 0.3s ease, opacity 0.2s ease;
}

.menu-toggle.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.menu-toggle.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 首页 Hero ---------- */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    gap: 64px;
    flex-wrap: wrap;
    position: relative;
    padding: 140px 0 80px;
    overflow: hidden;
}

/* 镜头/取景器圆环 */
.hero::before {
    content: '';
    position: absolute;
    right