/* =========================================
       Vietnam Premium Corporate Styles
       ========================================= */
:root {
    /* Colors: Emerald & Classic Gold */
    --vn-primary: #064E3B;
    /* Deep Emerald Green */
    --vn-primary-light: #047857;
    --vn-gold: #B48811;
    /* Classic Gold */
    --vn-gold-light: #F9E596;
    --vn-dark: #0F172A;
    /* Slate 900 */

    --bg-main: #F8FAFC;
    /* Light Slate background */
    --bg-white: #FFFFFF;
    --text-main: #1E293B;
    --text-muted: #475569;
    --border-color: #E2E8F0;

    --shadow-sm: 0 4px 6px -1px rgba(6, 78, 59, 0.05);
    --shadow-md: 0 10px 25px -3px rgba(6, 78, 59, 0.08);
    --shadow-lg: 0 25px 50px -12px rgba(6, 78, 59, 0.15);
    --shadow-gold: 0 10px 30px rgba(180, 136, 17, 0.2);

    --radius-md: 16px;
    --radius-lg: 24px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
    background-color: var(--bg-main);
    line-height: 1.7;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.3s;
}

/* Typography */
h1,
h2,
h3,
.serif-text {
    font-family: 'Playfair Display', serif;
    color: var(--vn-primary);
}

h1 {
    font-size: clamp(3rem, 5vw, 4.5rem);
    line-height: 1.1;
    margin-bottom: 24px;
    font-weight: 800;
}

h2 {
    font-size: clamp(2.2rem, 4vw, 3.2rem);
    line-height: 1.2;
    margin-bottom: 20px;
    font-weight: 700;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    font-weight: 700;
}

p {
    margin-bottom: 16px;
    font-size: 1.05rem;
    color: var(--text-muted);
}

.text-gold {
    color: var(--vn-gold);
}

.section-intro {
    font-size: 1.2rem;
    max-width: 800px;
    margin-bottom: 40px;
    color: var(--text-muted);
}

/* Layout */
.container {
    width: min(1280px, 100% - 48px);
    margin: 0 auto;
}

.section-pad {
    padding: 100px 0;
}

.section-dark {
    background-color: var(--vn-dark);
    color: white;
}

.section-dark h2,
.section-dark h3,
.section-dark p {
    color: white;
}

.section-dark p {
    opacity: 0.8;
}

.section-header {
    text-align: center;
    max-width: 850px;
    margin: 0 auto 60px;
}

/* Tags & Badges */
.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px;
    border-radius: 100px;
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    background: rgba(180, 136, 17, 0.1);
    color: var(--vn-gold);
    border: 1px solid rgba(180, 136, 17, 0.3);
    margin-bottom: 24px;
}

.section-tag::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--vn-gold);
}

.pill {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--bg-main);
    color: var(--vn-primary);
    border: 1px solid var(--border-color);
    margin-bottom: 16px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 1.05rem;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--vn-primary), var(--vn-primary-light));
    color: white;
    box-shadow: 0 10px 20px rgba(6, 78, 59, 0.2);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(6, 78, 59, 0.3);
    color: white;
}

.btn-secondary {
    background: white;
    color: var(--vn-primary);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    border-color: var(--vn-gold);
    color: var(--vn-gold);
    transform: translateY(-3px);
}

/* Grids */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

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

/* Cards */
.panel {
    background: white;
    border-radius: var(--radius-lg);
    padding: 40px 30px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    height: 100%;
}

.panel:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(6, 78, 59, 0.2);
}

/* Card Variants */
.soft-gold {
    border-top: 4px solid var(--vn-gold);
}

.soft-blue {
    border-top: 4px solid #3B82F6;
}

.soft-green {
    border-top: 4px solid var(--vn-primary);
}

/* Lists */
.key-list {
    list-style: none;
    margin-top: 16px;
}

.key-list li {
    position: relative;
    padding-left: 32px;
    margin-bottom: 12px;
    font-size: 1.05rem;
    color: var(--text-muted);
}

.key-list li::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--vn-gold);
    font-size: 1.1rem;
}

/* Hero Section - Immersive Dark */
.hero {
    position: relative;
    background: #022c22;
    padding: 160px 0 120px;
    overflow: hidden;
    color: white;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('../images/yuenanshouping.jpg') center/cover no-repeat;
    opacity: 0.15;
    mix-blend-mode: luminosity;
}

.hero-grid {
    position: relative;
    z-index: 10;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
    align-items: center;
}

.hero h1 {
    color: white;
    text-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.hero .hero-subcopy {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.25rem;
    margin-bottom: 40px;
}

.trust-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 30px;
}

.trust-chips span {
    padding: 8px 16px;
    border-radius: 100px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 0.85rem;
    font-weight: 600;
    color: white;
    backdrop-filter: blur(10px);
}

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

.hero-actions .btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: white;
    border-color: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(5px);
}

.hero-actions .btn-secondary:hover {
    background: white;
    color: var(--vn-primary);
}

/* Hero Cards (Floating right) */
.hero-cards {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.hero-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    padding: 30px;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.hero-card h3 {
    color: var(--vn-gold-light);
    font-family: 'Inter', sans-serif;
    font-size: 1.2rem;
}

.hero-card p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    margin-bottom: 12px;
}

.hero-card ul {
    list-style: none;
    padding: 0;
}

.hero-card ul li {
    color: white;
    font-size: 0.9rem;
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

.hero-card ul li::before {
    content: '✦';
    position: absolute;
    left: 0;
    color: var(--vn-gold);
}

.card-number {
    position: absolute;
    top: -10px;
    right: 10px;
    font-family: 'Playfair Display';
    font-size: 5rem;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.05);
    line-height: 1;
}

/* Image Wrapper */
.img-wrapper {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    position: relative;
    height: 100%;
    min-height: 400px;
}

.img-wrapper img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s;
}

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

/* Timeline Process */
.process-timeline {
    border-left: 2px solid var(--border-color);
    margin-left: 24px;
    padding-left: 40px;
    position: relative;
}

.process-item {
    position: relative;
    margin-bottom: 50px;
}

.process-item:last-child {
    margin-bottom: 0;
}

.timeline-num {
    position: absolute;
    left: -65px;
    top: 0;
    width: 48px;
    height: 48px;
    background: white;
    border: 2px solid var(--vn-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Playfair Display';
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--vn-primary);
    box-shadow: 0 0 0 8px var(--bg-main);
}

.process-item h3 {
    color: var(--vn-primary);
    margin-bottom: 8px;
}

/* Check Grid */
.check-grid {
    display: grid;
    gap: 20px;
    margin-top: 30px;
}

.check-item {
    display: flex;
    gap: 16px;
    background: rgba(255, 255, 255, 0.05);
    padding: 20px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.check-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--vn-gold);
    color: white;
    display: grid;
    place-items: center;
    font-weight: bold;
    flex-shrink: 0;
}

/* FAQ Accordion */
.faq-list {
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    gap: 16px;
}

.faq-item {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px 30px;
    cursor: pointer;
    transition: all 0.3s;
}

.faq-item.active {
    border-color: var(--vn-gold);
    box-shadow: var(--shadow-md);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--vn-dark);
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
}

.faq-question span:last-child {
    font-size: 1.5rem;
    color: var(--vn-gold);
    transition: transform 0.3s;
}

.faq-item.active .faq-question span:last-child {
    transform: rotate(45deg);
}

.faq-answer {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.3s ease;
}

.faq-answer>div {
    overflow: hidden;
}

.faq-item.active .faq-answer {
    grid-template-rows: 1fr;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

/* CTA Dark */
.cta-dark {
    background: linear-gradient(135deg, var(--vn-dark), var(--vn-primary));
    color: white;
    padding: 80px 60px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: 0 30px 60px rgba(6, 78, 59, 0.3);
    position: relative;
    overflow: hidden;
}

.cta-dark::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(180, 136, 17, 0.15) 0%, transparent 60%);
    border-radius: 50%;
    pointer-events: none;
}

.cta-dark h2 {
    color: white;
    margin-bottom: 24px;
}

.cta-dark p {
    color: rgba(255, 255, 255, 0.8);
    max-width: 700px;
    margin: 0 auto 40px;
    font-size: 1.15rem;
}

.cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 1024px) {

    .grid-2,
    .grid-3,
    .grid-4,
    .split-grid {
        grid-template-columns: 1fr;
    }

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

    .img-wrapper {
        min-height: 300px;
    }
}

/* =========================================
           全新：香港版高奢首屏 (HK Premium Hero)
        ========================================= */
.hero-premium-hk {
    position: relative;
    text-align: center;
    padding-top: 180px;
    padding-bottom: 0;
    /* 引入香港中环/维港高清夜景，设置 fixed 实现视差滚动 */
    background: url('../images/yuenanshouping.jpg') center/cover no-repeat fixed;
    color: white;
    overflow: hidden;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* 深色靛蓝 (Indigo) 磨砂遮罩，确保文字对比度 */
.hero-premium-hk::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.85) 0%, rgba(30, 27, 75, 0.92) 100%);
    z-index: 0;
}

/* 赛博朋克霓虹紫光晕聚焦 */
.hero-premium-hk::after {
    content: '';
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(147, 51, 234, 0.25) 0%, transparent 70%);
    border-radius: 50%;
    z-index: 0;
    pointer-events: none;
    animation: pulse-glow 8s infinite alternate ease-in-out;
}

@keyframes pulse-glow {
    0% {
        transform: translateX(-50%) scale(1);
        opacity: 0.6;
    }

    100% {
        transform: translateX(-50%) scale(1.1);
        opacity: 1;
    }
}

/* 确保内容悬浮在遮罩和光晕之上 */
.hero-premium-hk .container {
    position: relative;
    z-index: 10;
}

/* 针对暗色背景的文本优化 */
.hero-premium-hk h1 {
    color: white;
    text-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
}

.hero-premium-hk p.hero-sub {
    color: rgba(255, 255, 255, 0.85);
}

/* 针对暗色背景的次级按钮优化 (Glassmorphism) */
.btn-glass-hk {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.btn-glass-hk:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: white;
    color: white;
    transform: translateY(-3px);
}

/* 适配底部的滚动通知条 (Ticker) 到暗色主题 */
.hero-premium-hk .ticker-wrap {
    position: relative;
    z-index: 10;
    background: rgba(15, 23, 42, 0.6);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.hero-premium-hk .ticker-item {
    color: rgba(255, 255, 255, 0.7);
}

.floating-toc {
    position: fixed;
    bottom: 30px;
    left: 30px;
    z-index: 999;
}

.toc-toggle {
    background: var(--vn-primary);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 14px 24px;
    border-radius: 100px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 10px 25px rgba(6, 78, 59, 0.3);
    transition: all 0.3s;
}

.toc-toggle:hover {
    background: var(--vn-gold);
    transform: translateY(-2px);
}

.toc-menu {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 15px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
    width: max-content;
    min-width: 220px;
    max-height: 60vh;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transform-origin: bottom left;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.toc-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.toc-link {
    padding: 10px 15px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    border-radius: 10px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: 'Inter', sans-serif;
}

.toc-link::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: transparent;
}

.toc-link:hover,
.toc-link.active {
    background: rgba(6, 78, 59, 0.08);
    color: var(--vn-primary);
}

.toc-link.active::before {
    background: var(--vn-gold);
    box-shadow: 0 0 8px var(--vn-gold);
}

.toc-menu::-webkit-scrollbar {
    width: 4px;
}

.toc-menu::-webkit-scrollbar-thumb {
    background: rgba(6, 78, 59, 0.1);
    border-radius: 4px;
}

@media (max-width: 768px) {
    .floating-toc {
        bottom: 20px;
        left: 15px;
    }

    .toc-toggle {
        padding: 12px 20px;
        font-size: 0.9rem;
    }
}