/* ============================================
   星企社媒 - 现代化单页样式
   配色: 深色科技风 + 蓝绿渐变
   ============================================ */

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

:root {
    --bg-deep:        #050a14;
    --bg-base:        #0a1428;
    --bg-card:        #0d1b30;
    --bg-elevated:    #122846;
    --border:         rgba(80, 140, 220, 0.15);
    --border-strong:  rgba(80, 180, 255, 0.4);

    --text-primary:   #ffffff;
    --text-secondary: #c3cee2;
    --text-muted:     #8497b8;

    --blue-100:       #d6f0ff;
    --blue-300:       #6fc6ff;
    --blue-500:       #1e90ff;
    --blue-600:       #1565d8;
    --blue-700:       #0d3f8a;
    --cyan-300:       #7ce7f5;
    --cyan-400:       #22d3ee;
    --green-500:      #25d366;
    --green-600:      #1da851;

    --grad-blue:      linear-gradient(135deg, #1e90ff 0%, #6fc6ff 50%, #22d3ee 100%);
    --grad-cyan:      linear-gradient(135deg, #22d3ee 0%, #6fc6ff 100%);
    --grad-green:     linear-gradient(135deg, #25d366 0%, #1da851 100%);
    --grad-text:      linear-gradient(135deg, #ffffff 0%, #6fc6ff 60%, #22d3ee 100%);

    --shadow-glow:    0 0 60px rgba(30, 144, 255, 0.25);
    --shadow-card:    0 8px 30px rgba(0, 0, 0, 0.4);
    --radius:         16px;
    --radius-md:      12px;
    --radius-sm:      10px;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    /* 关键：html 必须也有 overflow-x:hidden，否则 body 内的子元素溢出
       会把布局视口撑大，vw 单位就会基于撑大后的视口计算，导致所有
       clamp(... vw ...) 字号异常偏大，整页看起来像没切换到移动端 */
    overflow-x: hidden;
    width: 100%;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.72;
    -webkit-font-smoothing: antialiased;
    -webkit-tap-highlight-color: transparent; /* 微信/手机浏览器点击不再闪灰色高亮 */
    overflow-x: hidden;
    text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}

/* ---------- 通用 section ---------- */
.section {
    padding: 100px 0;
    position: relative;
}

.section-head {
    text-align: center;
    margin-bottom: 64px;
    max-width: 820px;
    margin-left: auto;
    margin-right: auto;
}

.section-eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 3px;
    color: var(--blue-300);
    padding: 7px 20px;
    border: 1px solid var(--border-strong);
    border-radius: 100px;
    margin-bottom: 24px;
    background: rgba(30, 144, 255, 0.08);
}

.section-title {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: 1px;
    margin-bottom: 0;
}

/* 标题下方的渐变装饰线 */
.section-title::after {
    content: '';
    display: block;
    width: 72px;
    height: 4px;
    margin: 22px auto 20px;
    border-radius: 2px;
    background: var(--grad-blue);
    box-shadow: 0 0 12px rgba(30, 144, 255, 0.5);
}

.section-title em {
    font-style: normal;
    background: var(--grad-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-sub {
    font-size: 16px;
    font-weight: 400;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

/* ---------- 顶部导航 ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(5, 10, 20, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-text {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.logo-cn {
    font-size: 25px;
    font-weight: 800;
    letter-spacing: 4px;
    background: linear-gradient(120deg, #6fc6ff 0%, #22d3ee 45%, #1e90ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 12px rgba(34, 211, 238, 0.25));
}

.logo-en {
    font-size: 9px;
    color: var(--blue-300);
    letter-spacing: 3.2px;
    text-transform: uppercase;
    font-weight: 600;
    opacity: 0.85;
}

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

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 1px;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--blue-300);
}

.nav-cta {
    padding: 10px 22px;
    background: var(--grad-blue);
    color: #fff;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(30, 144, 255, 0.4);
}

/* ---------- 手机端快捷导航（抽屉式菜单） ---------- */
.mobile-nav {
    display: none; /* 桌面端隐藏，≤980px 显示 */
}

.mobile-nav-toggle {
    appearance: none;
    -webkit-appearance: none;
    background: rgba(30, 144, 255, 0.92);
    color: #fff;
    border: 1px solid rgba(34, 211, 238, 0.45);
    border-radius: 100px;
    padding: 8px 14px 8px 12px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 6px 18px rgba(30, 144, 255, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    white-space: nowrap;
}

.mobile-nav-toggle:hover,
.mobile-nav-toggle:focus-visible {
    background: rgba(30, 144, 255, 1);
    box-shadow: 0 8px 22px rgba(30, 144, 255, 0.5);
    outline: none;
}

.mobile-nav-toggle:active {
    transform: scale(0.96);
}

/* 三条横线小图标（不用 emoji，避免各 OS 字体不一致） */
.mobile-nav-bars {
    display: inline-flex;
    flex-direction: column;
    justify-content: space-between;
    width: 16px;
    height: 12px;
}
.mobile-nav-bars i {
    display: block;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: transform 0.25s ease, opacity 0.2s ease;
}
.mobile-nav-bars i:nth-child(1) { width: 100%; }
.mobile-nav-bars i:nth-child(2) { width: 75%; }
.mobile-nav-bars i:nth-child(3) { width: 50%; }

/* 展开后图标变成 X */
.mobile-nav-toggle.is-open .mobile-nav-bars i:nth-child(1) { width: 100%; transform: translateY(5px) rotate(45deg); }
.mobile-nav-toggle.is-open .mobile-nav-bars i:nth-child(2) { opacity: 0; }
.mobile-nav-toggle.is-open .mobile-nav-bars i:nth-child(3) { width: 100%; transform: translateY(-5px) rotate(-45deg); }

.mobile-nav-chevron {
    font-size: 12px;
    line-height: 1;
    transition: transform 0.25s ease;
}
.mobile-nav-toggle.is-open .mobile-nav-chevron { transform: rotate(180deg); }

/* 抽屉面板（默认隐藏，点按钮后展开） */
.mobile-nav-drawer {
    /* 默认状态：hidden 属性 + display:none，双保险
       仅当 JS 移除 hidden 属性后，用 :not([hidden]) 切到 flex 显示 */
    display: none;
    flex-direction: column;
    gap: 8px;
    padding: 14px 16px 18px;
    margin-top: 10px;
    background: rgba(8, 14, 28, 0.96);
    border: 1px solid var(--border-strong);
    border-radius: 16px;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(30, 144, 255, 0.08);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.mobile-nav-drawer:not([hidden]) {
    display: flex;
    flex-direction: column;
    align-self: stretch;    /* drawer 占满 .mobile-nav 容器宽度（按钮靠左、抽屉通栏） */
    width: 100%;
    animation: drawerSlide 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes drawerSlide {
    from { opacity: 0; transform: translateY(-10px); }
    to   { opacity: 1; transform: translateY(0); }
}

.mobile-nav-drawer a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    border-radius: 12px;
    text-decoration: none;
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.15s ease;
}

.mobile-nav-drawer a::before {
    content: '';
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--cyan-300);
    opacity: 0.6;
    flex-shrink: 0;
}

.mobile-nav-drawer a:hover,
.mobile-nav-drawer a:focus-visible {
    color: var(--blue-300);
    border-color: var(--border-strong);
    background: rgba(30, 144, 255, 0.08);
    outline: none;
}

.mobile-nav-drawer a:active {
    transform: scale(0.98);
    background: rgba(30, 144, 255, 0.18);
}

.showcase-phone-meta strong {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    word-break: break-word; /* 长英文账号名（如 @Expert in factory sourcing in China）小屏自动换行，不撑破卡片 */
    overflow-wrap: break-word;
}

/* ---------- 首屏 Hero ---------- */
.hero {
    position: relative;
    min-height: 100vh; /* 旧浏览器回退 */
    min-height: 100svh; /* 手机浏览器地址栏收起/展开时按可视高度计算，避免按钮被顶出屏幕 */
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: url('images_opt/p44_i3.jpg') center/cover no-repeat;
    opacity: 0.35;
    filter: contrast(1.2) saturate(1.1);
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(30, 144, 255, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(30, 144, 255, 0.08) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, #000 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 70%);
}

.hero-inner {
    position: relative;
    text-align: center;
    z-index: 1;
    isolation: isolate;          /* 建立独立层叠上下文，::before 不会落到 hero-grid 之下 */
}

/* WhatsApp 后方加 radial 柔光斑（多色呼吸光晕），让核心词视觉聚焦 */
.hero-inner::before {
    content: '';
    position: absolute;
    top: 48%;
    left: 50%;
    width: 760px;
    max-width: 90vw;
    height: 380px;
    transform: translate(-50%, -50%);
    background: radial-gradient(ellipse at center,
        rgba(0, 229, 255, 0.20) 0%,
        rgba(99, 102, 241, 0.14) 28%,
        rgba(37, 211, 102, 0.08) 48%,
        transparent 70%);
    z-index: -1;
    pointer-events: none;
    filter: blur(36px);
    animation: hero-aura 4.2s ease-in-out infinite;
}

.hero-tag {
    display: inline-block;
    font-size: 14px;
    font-weight: 500;
    color: var(--blue-300);
    padding: 8px 22px;
    border: 1px solid var(--border-strong);
    border-radius: 100px;
    background: rgba(30, 144, 255, 0.1);
    margin-bottom: 32px;
    letter-spacing: 4px;
}

.hero-title {
    font-size: clamp(34px, 10.5vw, 84px); /* 小屏降低下限，避免 320px 屏幕上"全渠道获客引流到"8个字挤成9行断行 */
    font-weight: 800;
    line-height: 1.12;
    margin-bottom: 28px;
    letter-spacing: 0.02em;
    text-shadow: 0 4px 30px rgba(10, 30, 60, 0.8);
}

.title-line {
    display: block;
    background: linear-gradient(180deg, #ffffff 30%, #c3d8ee 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-highlight {
    /* 核心：最关键的转化词 — 3 色渐变填充 + 多层光晕 + 呼吸动效 */
    position: relative;
    display: inline-block;
    margin-top: 20px;
    padding: 20px 72px;
    font-weight: 900;
    font-size: 1.06em;
    letter-spacing: 0.02em;
    color: transparent;
    border-radius: 100px;

    /* 双层背景：第一层是 4 色渐变（仅文字形状），第二层是深色（文字外的胶囊底盘） */
    background-image:
        linear-gradient(135deg, #00E5FF 0%, #38BDF8 30%, #6366F1 65%, #25D366 100%),
        linear-gradient(135deg, rgba(5, 10, 20, 0.82) 0%, rgba(10, 20, 40, 0.82) 100%);
    -webkit-background-clip: text, padding-box;
    background-clip: text, padding-box;
    -webkit-text-fill-color: transparent;

    /* 多层光晕：内描边 → 内发光 → 外青光 → 中紫光 → 远绿光 → 投影 */
    box-shadow:
        inset 0 0 0 2px rgba(0, 229, 255, 0.45),
        inset 0 0 30px rgba(99, 102, 241, 0.2),
        0 0 30px rgba(0, 229, 255, 0.5),
        0 0 60px rgba(99, 102, 241, 0.4),
        0 0 110px rgba(37, 211, 102, 0.32),
        0 10px 30px rgba(5, 10, 20, 0.5);
    animation: wa-breathe 2.8s ease-in-out infinite;
}

.hero-subtitle {
    font-size: 18px;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 48px;
    line-height: 1.85;
    letter-spacing: 1px;
    text-shadow: 0 2px 12px rgba(5, 10, 20, 0.8);
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 64px;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 100px;
    font-size: 15px;
    font-weight: 600;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--grad-blue);
    color: #fff;
    box-shadow: 0 8px 24px rgba(30, 144, 255, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(30, 144, 255, 0.5);
}

.btn-ghost {
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid var(--border-strong);
}

.btn-ghost:hover {
    background: rgba(30, 144, 255, 0.1);
    border-color: var(--blue-300);
}

.btn-lg {
    padding: 18px 40px;
    font-size: 17px;
}

.hero-platforms {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    max-width: 700px;
    margin: 0 auto;
}

.platform-tag {
    padding: 6px 16px;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    border-radius: 100px;
    transition: all 0.25s;
}

.platform-tag:hover {
    color: var(--blue-300);
    border-color: var(--border-strong);
    background: rgba(30, 144, 255, 0.1);
}

/* ---------- Hero 长按钮（公告横幅：全宽横贯 + 多色渐变 + 多层光晕 + 呼吸） ---------- */
.hero-longcta {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 880px;
    margin: 0 auto 40px;          /* 置顶横幅：无上间距，下接 hero-tag */
    padding: 20px 40px;

    /* 4 色渐变填充：青→蓝→紫→绿（与 WhatsApp 核心词同色谱） */
    background: linear-gradient(135deg,
        #22d3ee 0%,
        #1e90ff 35%,
        #6366F1 70%,
        #25D366 100%);
    color: #ffffff;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 1.2px;
    line-height: 1.6;             /* 长文案在窄屏自动换行后行距舒适 */
    text-align: center;

    border-radius: 18px;
    text-decoration: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    isolation: isolate;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);

    /* 静态光晕基础态：与 wa-breathe 同谱，让整个 hero 视觉统一 */
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.25),
        inset 0 -2px 12px rgba(0, 0, 0, 0.18),
        0 0 30px rgba(34, 211, 238, 0.45),
        0 0 60px rgba(99, 102, 241, 0.40),
        0 0 110px rgba(37, 211, 102, 0.28),
        0 14px 36px rgba(5, 10, 20, 0.55);

    /* 与 WhatsApp 同节奏（2.8s）—— 让两个核心视觉点同步呼吸 */
    animation: longcta-breathe 2.8s ease-in-out infinite;
    transition: transform 0.3s cubic-bezier(0.2, 0.7, 0.2, 1),
                box-shadow 0.3s ease;
}

/* 内部一层柔和的光泽层（不抢主体，只增加质感） */
.hero-longcta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg,
        rgba(255, 255, 255, 0.18) 0%,
        transparent 40%,
        transparent 60%,
        rgba(0, 0, 0, 0.10) 100%);
    pointer-events: none;
    z-index: -1;
    border-radius: inherit;
}

.hero-longcta:hover {
    transform: translateY(-4px);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.32),
        inset 0 -2px 12px rgba(0, 0, 0, 0.20),
        0 0 50px rgba(34, 211, 238, 0.80),
        0 0 100px rgba(99, 102, 241, 0.60),
        0 0 170px rgba(37, 211, 102, 0.48),
        0 18px 42px rgba(5, 10, 20, 0.65);
}

.hero-longcta:active {
    transform: translateY(-1px);
}

.hero-scroll-hint {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 2px;
    animation: float 2s ease-in-out infinite;
}

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

/* ---------- 关于我们 ---------- */
.section-about {
    background: var(--bg-base);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text .lead {
    font-size: 19px;
    color: var(--text-primary);
    line-height: 1.7;
    margin-bottom: 32px;
}

.about-points {
    list-style: none;
}

.about-points li {
    padding: 16px 0;
    border-bottom: 1px dashed var(--border);
    color: var(--text-secondary);
    font-size: 15px;
}

.about-points li strong {
    color: var(--blue-300);
    font-size: 20px;
    font-weight: 700;
    margin-right: 12px;
    display: inline-block;
    min-width: 70px;
}

.about-quote {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 48px 40px;
    position: relative;
    box-shadow: var(--shadow-card);
}

.quote-mark {
    font-size: 80px;
    line-height: 0.5;
    color: var(--blue-500);
    opacity: 0.4;
    margin-bottom: 8px;
    font-family: Georgia, serif;
}

.about-quote p {
    font-size: 21px;
    color: var(--text-primary);
    font-weight: 700;
    letter-spacing: 0.5px;
    line-height: 1.55;
    margin-bottom: 24px;
    background: linear-gradient(120deg, #ffffff 0%, #9fd4ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.quote-tagline {
    font-size: 13px;
    color: var(--blue-300);
    letter-spacing: 3px;
    font-weight: 500;
}

/* ---------- 痛点 ---------- */
.section-pain {
    background: var(--bg-deep);
}

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

.pain-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 28px;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.pain-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--grad-blue);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s;
}

.pain-card:hover {
    border-color: var(--border-strong);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

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

.pain-num {
    font-size: 46px;
    font-weight: 800;
    background: var(--grad-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 16px;
    opacity: 0.4;
}

.pain-card h3 {
    font-size: 19px;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.pain-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.75;
}

/* ---------- 解决方案 ---------- */
.section-solution {
    background: var(--bg-base);
    position: relative;
}

.section-solution::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(30, 144, 255, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.hex-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 16px;
    max-width: 1100px;
    margin: 0 auto 60px;
    padding: 20px 0;
}

.hex-card {
    aspect-ratio: 1;
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    background: var(--bg-card);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    position: relative;
}

.hex-card.highlight {
    background: var(--grad-blue);
}

.hex-card:hover {
    transform: scale(1.05);
}

.hex-inner {
    text-align: center;
    color: var(--text-primary);
    padding: 20% 8%;
}

.hex-inner strong {
    display: block;
    font-size: 21px;
    font-weight: 800;
    letter-spacing: 2px;
    line-height: 1.2;
}

.hex-inner span {
    display: block;
    font-size: 13px;
    letter-spacing: 2px;
    margin-top: 4px;
    opacity: 0.85;
}

.solution-statement {
    text-align: center;
    padding: 40px 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    max-width: 880px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.solution-statement p {
    font-size: 21px;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--text-primary);
}

.solution-statement strong {
    color: var(--cyan-400);
    font-weight: 800;
}

/* ---------- 服务体系 ---------- */
.section-service {
    background: var(--bg-deep);
}

.engine-block {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px;
    margin-bottom: 28px;
    transition: all 0.3s;
}

.engine-block:hover {
    border-color: var(--border-strong);
}

.engine-block.highlight-block {
    background: linear-gradient(135deg, rgba(37, 211, 102, 0.08) 0%, var(--bg-card) 60%);
    border-color: rgba(37, 211, 102, 0.3);
}

.engine-head {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 28px;
}

.engine-badge {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--grad-blue);
    border-radius: 14px;
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}

.engine-badge-wa {
    background: var(--grad-green);
}

.engine-head h3 {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.engine-head p {
    font-size: 14px;
    letter-spacing: 0.5px;
    color: var(--blue-300);
}

.engine-flow {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    padding: 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
    margin-bottom: 24px;
}

.engine-flow span {
    padding: 8px 18px;
    background: rgba(30, 144, 255, 0.15);
    border: 1px solid var(--border-strong);
    border-radius: 100px;
    font-size: 14px;
    color: var(--text-primary);
}

.engine-flow span.hl {
    background: var(--grad-blue);
    color: #fff;
    font-weight: 600;
    border-color: transparent;
}

.engine-flow i {
    color: var(--text-muted);
    font-style: normal;
}

.engine-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.engine-features-4 {
    grid-template-columns: repeat(4, 1fr);
}

.engine-features > div {
    padding: 16px 18px;
    background: rgba(30, 144, 255, 0.05);
    border-left: 2px solid var(--blue-500);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.65;
}

.engine-features > div strong {
    display: block;
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
}

.engine-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}

.wa-countries {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.wa-countries span {
    padding: 6px 14px;
    background: rgba(37, 211, 102, 0.1);
    border: 1px solid rgba(37, 211, 102, 0.3);
    border-radius: 100px;
    font-size: 13px;
    color: var(--green-500);
}

.wa-countries .more {
    background: var(--grad-green);
    color: #fff;
    border-color: transparent;
    font-weight: 600;
}

/* ---------- 数据优势 ---------- */
.section-stats {
    background: var(--bg-base);
}

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

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 28px;
    text-align: center;
    position: relative;
    transition: all 0.3s;
    overflow: hidden;
}

.stat-card.highlight {
    background: linear-gradient(135deg, rgba(30, 144, 255, 0.2) 0%, var(--bg-card) 100%);
    border-color: var(--border-strong);
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-strong);
}

.stat-num {
    font-size: 54px;
    font-weight: 800;
    letter-spacing: -1px;
    line-height: 1;
    margin-bottom: 12px;
    background: linear-gradient(180deg, #ffffff 0%, #6fc6ff 70%, #22d3ee 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-num small {
    font-size: 23px;
    color: var(--cyan-400);
    -webkit-text-fill-color: var(--cyan-400);
    margin-left: 2px;
}

.stat-label {
    font-size: 16px;
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.stat-sub {
    font-size: 13px;
    color: var(--text-muted);
    letter-spacing: 0.3px;
    line-height: 1.65;
}

/* ---------- 行业案例 ---------- */
.section-cases {
    background: var(--bg-deep);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-bottom: 48px;
}

.case-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.3s;
}

.case-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-strong);
    box-shadow: var(--shadow-glow);
}

.case-img {
    width: 100%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--bg-elevated);
    position: relative;
}

.case-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s;
}

.case-card:hover .case-img img {
    transform: scale(1.05);
}

.case-img-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--blue-700) 0%, var(--bg-elevated) 100%);
}

.placeholder-text {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
    padding: 0 20px;
}

.case-tag {
    display: inline-block;
    margin: 20px 24px 0;
    padding: 4px 12px;
    background: rgba(30, 144, 255, 0.15);
    color: var(--blue-300);
    font-size: 12px;
    border-radius: 100px;
    font-weight: 600;
}

.case-card h3 {
    font-size: 19px;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin: 12px 24px 8px;
}

.case-card p {
    padding: 0 24px 24px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.75;
}

.case-img-tag {
    position: absolute;
    bottom: 10px;
    left: 10px;
    right: 10px;
    padding: 6px 12px;
    background: rgba(5, 10, 20, 0.78);
    backdrop-filter: blur(8px);
    color: var(--cyan-300);
    font-size: 12px;
    font-weight: 600;
    border-radius: 6px;
    border: 1px solid rgba(34, 211, 238, 0.3);
    text-align: center;
}

/* ---------- 账号矩阵 showcase ---------- */
.showcase-phone-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.showcase-phone {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.showcase-phone:hover {
    transform: translateY(-6px);
    border-color: var(--cyan-400);
    box-shadow: 0 12px 36px rgba(34, 211, 238, 0.18);
}

.showcase-phone img {
    width: 100%;
    aspect-ratio: 9 / 19;
    object-fit: cover;
    display: block;
    background: var(--bg-elevated);
}

/* 4号位：宽幅账号矩阵全景 */
.showcase-phone-portfolio {
    border-color: rgba(34, 211, 238, 0.4);
    background: linear-gradient(180deg, rgba(34, 211, 238, 0.08), var(--bg-card));
}

.showcase-phone-portfolio img {
    aspect-ratio: 16 / 9;
    object-fit: cover;
    object-position: center;
}

/* 第4张：装饰卡片 - 「更多优质账号」 */
.showcase-phone-more {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 32px 20px;
    background: linear-gradient(135deg, rgba(30, 144, 255, 0.10) 0%, rgba(34, 211, 238, 0.06) 100%);
    border: 2px dashed rgba(34, 211, 238, 0.35);
    gap: 14px;
    min-height: 100%;
}

.showcase-phone-more:hover {
    transform: translateY(-6px);
    border-color: var(--cyan-400);
    background: linear-gradient(135deg, rgba(30, 144, 255, 0.18) 0%, rgba(34, 211, 238, 0.12) 100%);
    box-shadow: 0 12px 36px rgba(34, 211, 238, 0.18);
}

.more-icon-wrap {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--blue-500), var(--cyan-400));
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 20px rgba(34, 211, 238, 0.35);
    margin-bottom: 4px;
}

.more-icon {
    color: #ffffff;
    font-size: 38px;
    font-weight: 300;
    line-height: 1;
    margin-top: -3px;
}

.more-number {
    font-size: 48px;
    font-weight: 800;
    background: var(--grad-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
    line-height: 1;
}

.more-text {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.5px;
    margin-top: 2px;
}

.more-sub {
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-bottom: 4px;
}

.more-bullets {
    display: flex;
    flex-direction: column;
    gap: 5px;
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 8px;
    padding-top: 12px;
    border-top: 1px solid rgba(34, 211, 238, 0.18);
    width: 75%;
}

.more-bullets span {
    letter-spacing: 0.3px;
}

.showcase-phone-meta {
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    border-top: 1px solid var(--border);
}

.showcase-phone-meta strong {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
}

.showcase-phone-meta span {
    font-size: 12px;
    color: var(--text-muted);
}

/* ---------- 运营工具矩阵 tools ---------- */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all 0.3s ease;
}

.tool-card:hover {
    border-color: var(--blue-500);
    transform: translateY(-4px);
    box-shadow: 0 12px 36px rgba(30, 144, 255, 0.2);
}

.tool-img {
    overflow: hidden;
    background: #f5f5f7;
    aspect-ratio: 16 / 10;
}

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

.tool-card .tool-tag {
    display: inline-block;
    margin: 20px 24px 0;
    padding: 4px 12px;
    background: rgba(34, 211, 238, 0.12);
    color: var(--cyan-300);
    font-size: 12px;
    border-radius: 100px;
    font-weight: 600;
}

.tool-card h4 {
    font-size: 19px;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin: 12px 24px 8px;
}

.tool-card p {
    padding: 0 24px 24px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ---------- 反馈区多截图 ---------- */
.feedback-screenshots {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 18px;
    margin-top: 48px;
}

.feedback-screenshot {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all 0.3s ease;
}

.feedback-screenshot:hover {
    transform: translateY(-4px);
    border-color: var(--cyan-400);
    box-shadow: 0 8px 24px rgba(34, 211, 238, 0.2);
}

.feedback-screenshot img {
    width: 100%;
    aspect-ratio: 9 / 16;
    object-fit: cover;
    display: block;
    background: #1a1f2e;
}

.screenshot-caption {
    padding: 12px 14px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
    border-top: 1px solid var(--border);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .showcase-phone-row {
        grid-template-columns: repeat(3, 1fr);
    }
    .feedback-screenshots {
        grid-template-columns: repeat(3, 1fr);
    }
    .tools-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .showcase-phone-row {
        grid-template-columns: repeat(2, 1fr);
    }
    /* 反馈截图原本是 5 项 → 在 2 列下最后一行必留 1 块空白;
       改为单列满宽布局，所有 5 张图全部正常显示，没有空卡片 */
    .feedback-screenshots {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    /* 9:16 竖图在单列 360-414px 屏宽下高度可达 600+px，
       限制在 320px + object-fit:cover 让卡片更紧凑 */
    .feedback-screenshot img {
        max-height: 320px;
    }
}

.case-cta {
    text-align: center;
    padding: 32px;
    background: var(--bg-card);
    border: 1px dashed var(--border-strong);
    border-radius: var(--radius);
}

.case-cta p {
    font-size: 17px;
    color: var(--text-secondary);
}

.case-cta strong {
    color: var(--blue-300);
    font-weight: 600;
}

/* ---------- 关键词霸屏 ---------- */
.section-keywords {
    background: var(--bg-base);
}

.keywords-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.keyword-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.3s;
}

.keyword-card:hover {
    border-color: var(--blue-500);
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(30, 144, 255, 0.18);
}

.keyword-img {
    aspect-ratio: 9 / 16;
    overflow: hidden;
    background: #000;
}

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

.keyword-search-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.05);
    border-bottom: 1px solid var(--border);
}

.search-icon {
    font-size: 14px;
    opacity: 0.6;
}

.search-text {
    font-size: 13px;
    color: var(--text-primary);
    font-weight: 500;
    letter-spacing: 0.3px;
}

.keyword-meta {
    padding: 14px;
}

.keyword-meta strong {
    display: block;
    font-size: 15px;
    font-weight: 700;
    color: var(--cyan-400);
    margin-bottom: 4px;
}

.keyword-meta span {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.5;
}

@media (max-width: 1024px) {
    .keywords-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .keywords-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
}

/* ---------- 客户反馈 ---------- */
.section-feedback {
    background: var(--bg-base);
}

.feedback-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 48px;
    box-shadow: var(--shadow-card);
}

.feedback-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 28px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.feedback-stat-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.feedback-stat-item strong {
    font-size: 28px;
    font-weight: 800;
    background: var(--grad-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.5px;
    line-height: 1.2;
}

.feedback-stat-item span {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.feedback-img {
    position: relative;
    border-radius: var(--radius-sm);
    overflow: hidden;
    max-height: 460px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feedback-img img {
    width: 100%;
    height: 100%;
    max-height: 460px;
    object-fit: cover;
    object-position: center;
    border-radius: var(--radius-sm);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    filter: blur(1.2px);
    -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.15) 0%, rgba(0, 0, 0, 0.85) 18%, rgba(0, 0, 0, 1) 50%, rgba(0, 0, 0, 0.85) 82%, rgba(0, 0, 0, 0.15) 100%);
    mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.15) 0%, rgba(0, 0, 0, 0.85) 18%, rgba(0, 0, 0, 1) 50%, rgba(0, 0, 0, 0.85) 82%, rgba(0, 0, 0, 0.15) 100%);
}

.feedback-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(30, 144, 255, 0.18), rgba(34, 211, 238, 0.10));
    pointer-events: none;
    border-radius: var(--radius-sm);
}

/* 中间叠一个 WhatsApp 氛围徽章 - 弱化细节对话 */
.feedback-badge {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    background: rgba(37, 211, 102, 0.92);
    color: #ffffff;
    padding: 12px 22px;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.5px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.feedback-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #ffffff;
    box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.7);
    animation: pulse-dot 1.6s infinite;
}

@keyframes pulse-dot {
    0% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(255, 255, 255, 0); }
    100% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0); }
}

.feedback-overlay {
    position: absolute;
    bottom: 16px;
    left: 16px;
    padding: 6px 14px;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    border-radius: 100px;
    font-size: 12px;
    color: var(--cyan-400);
    border: 1px solid rgba(34, 211, 238, 0.3);
    z-index: 3;
}

/* 行业06案例图 - 同样的氛围化处理 */
.case-img-chat {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--bg-elevated);
}

.case-img-chat img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: blur(1px);
    -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,0.2) 0%, rgba(0,0,0,1) 40%, rgba(0,0,0,1) 60%, rgba(0,0,0,0.2) 100%);
    mask-image: linear-gradient(180deg, rgba(0,0,0,0.2) 0%, rgba(0,0,0,1) 40%, rgba(0,0,0,1) 60%, rgba(0,0,0,0.2) 100%);
}

.case-img-chat::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(30, 144, 255, 0.10), rgba(37, 211, 102, 0.08));
}

.case-img-chat .chat-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    background: rgba(37, 211, 102, 0.92);
    color: #ffffff;
    padding: 10px 20px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.5px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.case-img-chat .chat-center::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #ffffff;
    animation: pulse-dot 1.6s infinite;
}

.feedback-text h3 {
    font-size: 24px;
    margin-bottom: 20px;
    background: var(--grad-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feedback-quote {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
    padding: 20px;
    background: rgba(30, 144, 255, 0.05);
    border-left: 3px solid var(--blue-500);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.feedback-list {
    list-style: none;
}

.feedback-list li {
    padding: 10px 0;
    font-size: 15px;
    color: var(--text-primary);
    border-bottom: 1px dashed var(--border);
}

.feedback-list li:last-child {
    border-bottom: none;
}

/* ---------- 团队风采 ---------- */
.section-team {
    background: var(--bg-deep);
}

.team-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 48px;
}

.team-img {
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
    transition: all 0.3s;
}

.team-img:hover {
    transform: translateY(-4px);
    border-color: var(--border-strong);
}

.team-slogan {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 32px;
}

.team-slogan-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all 0.3s;
}

.team-slogan-item:hover {
    border-color: var(--border-strong);
    background: var(--bg-elevated);
}

.slogan-num {
    font-size: 30px;
    font-weight: 800;
    background: var(--grad-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.55;
    line-height: 1;
}

.slogan-text {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--text-primary);
}

/* ---------- 联系我们 ---------- */
.section-contact {
    background: var(--bg-base);
}

.contact-card {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-elevated) 100%);
    border: 1px solid var(--border-strong);
    border-radius: 24px;
    padding: 80px 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.contact-card::before {
    content: '';
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(30, 144, 255, 0.2) 0%, transparent 70%);
    pointer-events: none;
}

.contact-card .section-eyebrow {
    position: relative;
}

.contact-card .section-title {
    font-size: clamp(32px, 5vw, 48px);
    position: relative;
}

.contact-sub {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    position: relative;
}

.contact-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 56px;
    position: relative;
}

.contact-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    padding-top: 40px;
    border-top: 1px solid var(--border);
    position: relative;
}

.contact-stats > div {
    text-align: center;
}

.contact-stats strong {
    display: block;
    font-size: 36px;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(180deg, #ffffff 0%, #6fc6ff 70%, #22d3ee 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.contact-stats span {
    font-size: 13px;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

/* ---------- 底部 ---------- */
.footer {
    background: var(--bg-deep);
    border-top: 1px solid var(--border);
    padding: 48px 0 32px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 40px;
    flex-wrap: wrap;
}

.footer-brand p {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 8px;
    letter-spacing: 1px;
}

.footer-meta {
    text-align: right;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 2;
}

.footer-copy {
    color: var(--text-muted);
    font-size: 12px;
    margin-top: 8px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
    .nav-links { display: none; }
    .nav-cta { padding: 8px 16px; font-size: 13px; }

    /* 手机端"≡ 菜单"按钮 + 抽屉：固定在 navbar 下方，锚点定位需下移避开 */
    .mobile-nav {
        display: flex;
        flex-direction: column;
        align-items: flex-start;   /* 抽屉按钮靠左对齐，不占满整行 */
        position: fixed;
        top: 84px;                 /* 紧贴 navbar (72px) 下沿，留 12px 视觉间距 */
        left: 16px;
        right: 16px;
        z-index: 999;
    }

    /* 抽屉按钮：自适应内容宽度，靠左停靠，不再是通栏 */
    .mobile-nav-toggle {
        width: auto;
        justify-content: flex-start;
        padding: 10px 18px 10px 14px;
        font-size: 13.5px;
    }

    /* 手机导航抽屉按钮占了 ~40-48px，锚点定位需下移避开 */
    html { scroll-padding-top: 148px; }

    /* 首屏顶部留白避开固定导航+抽屉按钮 */
    .hero { padding-top: 170px; }

    .about-grid,
    .feedback-block,
    .team-grid { grid-template-columns: 1fr; gap: 32px; }

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

    .hex-grid { grid-template-columns: repeat(4, 1fr); }
    .engine-features, .engine-features-4 { grid-template-columns: 1fr; }
    .team-slogan { grid-template-columns: 1fr; }
    .contact-stats { grid-template-columns: 1fr; gap: 24px; }
    .contact-card { padding: 48px 24px; }

    .section { padding: 64px 0; }
    .section-head { margin-bottom: 40px; }
    .container { padding: 0 20px; }
}

@media (max-width: 640px) {
    .pain-grid,
    .stats-grid,
    .cases-grid { grid-template-columns: 1fr; }

    .hex-grid { grid-template-columns: repeat(3, 1fr); }

    /* 7 个六边形在第 3 列布局下会剩 1 个孤零零靠左，把它放到中间列 */
    .hex-grid .hex-card:last-child { grid-column: 2; }

    .engine-flow { gap: 4px; }
    .engine-flow span { padding: 6px 12px; font-size: 12px; }
    .engine-flow i { display: none; }

    .footer-inner { flex-direction: column; }
    .footer-meta { text-align: left; }
}

/* ---------- 小屏手机的间距与字号收敛（微信转发后主流打开场景：375-414px） ---------- */
@media (max-width: 480px) {
    .section { padding: 48px 0; }
    .section-head { margin-bottom: 32px; }
    .container { padding: 0 16px; }

    /* 大卡片内边距收敛，避免文字挤成窄条 */
    .feedback-block { padding: 24px 18px; gap: 24px; }
    .engine-block { padding: 24px 18px; }
    .about-quote { padding: 32px 24px; }
    .solution-statement { padding: 28px 20px; }
    .solution-statement p { font-size: 17px; }
    .pain-card { padding: 26px 20px; }
    .stat-card { padding: 28px 20px; }
    .stat-card.highlight { transform: none; } /* 单列布局下缩放会露出裁切边 */

    /* 字号与字距微调 */
    .section-title { letter-spacing: 0.5px; }
    .hero-tag { letter-spacing: 2px; padding: 7px 16px; font-size: 13px; }
    .hero-subtitle { font-size: 15px; letter-spacing: 0.5px; }
    /* WhatsApp 核心词手机端收敛：缩小内边距 + 略降字号，避免溢出 */
    .title-highlight { padding: 14px 38px; font-size: 0.92em; margin-top: 14px; }
    .quote-mark { font-size: 56px; }
    .about-quote p { font-size: 18px; }

    /* 手机上按钮占满一行更好按 */
    .hero-cta .btn,
    .contact-cta .btn { width: 100%; max-width: 320px; }
    .contact-cta { flex-direction: column; align-items: center; }

    /* 长按钮手机端：16px 定稿字号，长文案允许两行显示 */
    .hero-longcta {
        padding: 15px 20px;
        font-size: 16px;
        letter-spacing: 0.5px;
        margin: 0 auto 32px;
        border-radius: 14px;
    }

    /* 长账号名/长句进一步收敛 */
    .showcase-phone-meta strong { font-size: 13px; }
    .screenshot-caption { font-size: 12px; }

    /* Hero 滚动提示在矮屏上可能与按钮重叠 */
    .hero-scroll-hint { display: none; }
}

/* ---------- WhatsApp 核心词呼吸动效 ---------- */
@keyframes wa-breathe {
    0%, 100% {
        transform: scale(1);
        box-shadow:
            inset 0 0 0 2px rgba(0, 229, 255, 0.45),
            inset 0 0 30px rgba(99, 102, 241, 0.2),
            0 0 30px rgba(0, 229, 255, 0.5),
            0 0 60px rgba(99, 102, 241, 0.4),
            0 0 110px rgba(37, 211, 102, 0.32),
            0 10px 30px rgba(5, 10, 20, 0.5);
    }
    50% {
        transform: scale(1.03);
        box-shadow:
            inset 0 0 0 2px rgba(0, 229, 255, 0.75),
            inset 0 0 40px rgba(99, 102, 241, 0.32),
            0 0 50px rgba(0, 229, 255, 0.85),
            0 0 100px rgba(99, 102, 241, 0.6),
            0 0 170px rgba(37, 211, 102, 0.5),
            0 10px 30px rgba(5, 10, 20, 0.5);
    }
}

/* Hero 区域柔光斑呼吸（与 WhatsApp 节奏错开，避免同步闪烁） */
@keyframes hero-aura {
    0%, 100% { opacity: 0.72; transform: translate(-50%, -50%) scale(1); }
    50%      { opacity: 1;    transform: translate(-50%, -50%) scale(1.10); }
}

/* 长按钮呼吸动效（与 wa-breathe 同节奏 2.8s，同色谱） */
@keyframes longcta-breathe {
    0%, 100% {
        transform: scale(1);
        box-shadow:
            inset 0 1px 0 rgba(255, 255, 255, 0.25),
            inset 0 -2px 12px rgba(0, 0, 0, 0.18),
            0 0 30px rgba(34, 211, 238, 0.45),
            0 0 60px rgba(99, 102, 241, 0.40),
            0 0 110px rgba(37, 211, 102, 0.28),
            0 14px 36px rgba(5, 10, 20, 0.55);
    }
    50% {
        transform: scale(1.025);
        box-shadow:
            inset 0 1px 0 rgba(255, 255, 255, 0.32),
            inset 0 -2px 12px rgba(0, 0, 0, 0.20),
            0 0 50px rgba(34, 211, 238, 0.80),
            0 0 100px rgba(99, 102, 241, 0.60),
            0 0 170px rgba(37, 211, 102, 0.48),
            0 14px 36px rgba(5, 10, 20, 0.55);
    }
}

/* ---------- 减弱动画（系统开启"减少动态效果"时，微信 iOS 也遵守） ---------- */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}