/* ========================================
   高对比现代数字资产产品目录 - style.css
   Template 010
======================================== */

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

:root {
    --black: #0a0a0a;
    --black-2: #141414;
    --black-3: #1f1f1f;
    --black-4: #2a2a2a;
    --white: #ffffff;
    --off-white: #f5f5f0;
    --gray: #888;
    --gray-light: #bbb;
    --gray-dark: #444;
    --yellow: #facc15;
    --yellow-dark: #eab308;
    --yellow-light: #fef9c3;
    --border: #2a2a2a;
    --border-light: #e5e5e5;
    --radius: 4px;
    --radius-lg: 8px;
    --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', sans-serif;
    --font-mono: 'Noto Sans Mono', 'SF Mono', Consolas, monospace;
    --shadow: 0 4px 20px rgba(0,0,0,0.15);
    --container: 1240px;
    --ease: cubic-bezier(0.25,0.46,0.45,0.94);
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.7;
    color: var(--black);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

a {
    color: inherit;
    text-decoration: none;
    transition: all 0.2s var(--ease);
}

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

ul, ol { list-style: none; }

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* ========================================
   Header & Announcement
======================================== */
.announcement {
    background: var(--yellow);
    color: var(--black);
    font-size: 13px;
    font-weight: 500;
    padding: 8px 0;
}

.ann-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.ann-text {
    display: flex;
    align-items: center;
    gap: 8px;
}

.ann-phone {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 700;
}

.site-header {
    background: var(--black);
    color: white;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

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

.brand-mark {
    background: var(--yellow);
    color: var(--black);
    padding: 8px 14px;
    font-weight: 900;
    font-size: 18px;
    font-family: var(--font-mono);
    border-radius: var(--radius);
    letter-spacing: -0.02em;
}

.brand-sub {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.brand-slogan {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    color: var(--yellow);
    letter-spacing: 0.05em;
}

.brand-cn {
    font-size: 12px;
    color: var(--gray);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: white;
    transition: all 0.2s var(--ease);
}

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

.main-nav a {
    display: block;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-light);
    border-radius: var(--radius);
    position: relative;
}

.main-nav a:hover {
    color: white;
}

.main-nav a.active {
    color: var(--yellow);
}

.nav-cta a {
    background: var(--yellow);
    color: var(--black) !important;
    font-weight: 700;
    margin-left: 8px;
}

.nav-cta a:hover {
    background: var(--yellow-dark);
}

/* ========================================
   Buttons
======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 700;
    border-radius: var(--radius);
    transition: all 0.2s var(--ease);
    border: 2px solid transparent;
    cursor: pointer;
    white-space: nowrap;
    font-family: var(--font-sans);
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.btn-yellow {
    background: var(--yellow);
    color: var(--black);
    border-color: var(--yellow);
}

.btn-yellow:hover {
    background: var(--yellow-dark);
    border-color: var(--yellow-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(250,204,21,0.4);
}

.btn-dark {
    background: var(--black);
    color: white;
    border-color: var(--black);
}

.btn-dark:hover {
    background: var(--black-3);
}

.btn-outline-white {
    background: transparent;
    color: white;
    border-color: rgba(255,255,255,0.3);
}

.btn-outline-white:hover {
    border-color: white;
    background: rgba(255,255,255,0.1);
}

.btn-outline-yellow {
    background: transparent;
    color: var(--yellow);
    border-color: var(--yellow);
}

.btn-outline-yellow:hover {
    background: var(--yellow);
    color: var(--black);
}

.btn-lg { padding: 16px 32px; font-size: 15px; }
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn.full { width: 100%; }

/* ========================================
   Hero
======================================== */
.hero {
    background: var(--black);
    color: white;
    padding: 80px 0 100px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: repeating-linear-gradient(90deg, var(--yellow) 0, var(--yellow) 20px, transparent 20px, transparent 40px);
}

.hero-inner {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
}

.hero-kicker {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: rgba(250,204,21,0.1);
    border: 1px solid rgba(250,204,21,0.3);
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 500;
    color: var(--yellow);
    font-family: var(--font-mono);
    margin-bottom: 28px;
}

.kicker-dot {
    width: 8px;
    height: 8px;
    background: var(--yellow);
    border-radius: 50%;
    animation: blink 1.5s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.hero-title {
    font-size: 72px;
    font-weight: 900;
    line-height: 0.95;
    letter-spacing: -0.03em;
    margin-bottom: 28px;
    font-family: var(--font-mono);
}

.title-line {
    display: block;
}

.title-line.accent {
    color: var(--yellow);
    -webkit-text-stroke: 0;
}

.hero-sub {
    font-size: 16px;
    color: var(--gray-light);
    line-height: 1.8;
    max-width: 520px;
    margin-bottom: 36px;
}

.hero-ctas {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.hero-meta {
    display: flex;
    gap: 32px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

.hero-meta-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--gray);
}

.hero-meta-item svg {
    color: var(--yellow);
}

.hero-meta-item strong {
    display: block;
    color: white;
    font-weight: 700;
    font-size: 14px;
}

.hero-meta-item a {
    color: inherit;
}

.hero-right {
    position: relative;
}

.hero-banner-wrap {
    position: relative;
    border: 3px solid var(--yellow);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transform: rotate(-2deg);
}

.hero-banner-wrap img {
    width: 100%;
    filter: contrast(1.05);
}

.badge-corner {
    position: absolute;
    top: 16px;
    right: -30px;
    background: var(--yellow);
    color: var(--black);
    padding: 6px 40px;
    font-size: 11px;
    font-weight: 900;
    font-family: var(--font-mono);
    transform: rotate(45deg);
    letter-spacing: 0.1em;
}

.hero-chip {
    position: absolute;
    background: white;
    color: var(--black);
    padding: 10px 16px;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: var(--shadow);
}

.chip-1 {
    top: -10px;
    left: -20px;
}

.chip-2 {
    bottom: 30px;
    right: -20px;
}

.chip-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.chip-dot.green { background: #22c55e; }
.chip-dot.yellow { background: var(--yellow); }

/* ========================================
   Ribbon Strip
======================================== */
.ribbon-strip {
    background: var(--yellow);
    color: var(--black);
    padding: 14px 0;
    border-bottom: 3px solid var(--black);
}

.strip-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    font-size: 14px;
    font-weight: 700;
    flex-wrap: wrap;
    font-family: var(--font-mono);
}

.strip-num {
    font-weight: 900;
    margin-right: 6px;
    color: var(--black);
    opacity: 0.5;
}

.strip-sep {
    color: var(--black);
    opacity: 0.3;
    font-weight: 900;
}

/* ========================================
   Section Head
======================================== */
.section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 40px;
    margin-bottom: 48px;
}

.section-head.center {
    flex-direction: column;
    text-align: center;
    align-items: center;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
    color: var(--black);
    letter-spacing: 0.1em;
    padding: 4px 0;
    border-bottom: 3px solid var(--yellow);
    margin-bottom: 12px;
}

.section-tag.center {
    margin: 0 auto 16px;
}

.section-head h2 {
    font-size: 40px;
    font-weight: 900;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.section-desc {
    font-size: 15px;
    color: var(--gray-dark);
    max-width: 480px;
    line-height: 1.7;
}

.section-head.center .section-desc {
    max-width: 600px;
}

/* ========================================
   Platforms Section
======================================== */
.platforms-section {
    padding: 100px 0;
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.platform-card {
    background: white;
    border: 2px solid var(--black);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all 0.2s var(--ease);
    position: relative;
    overflow: hidden;
}

.platform-card:hover {
    transform: translateY(-6px);
    box-shadow: 8px 8px 0 var(--yellow);
}

.platform-card.primary {
    background: var(--black);
    color: white;
}

.platform-card.primary .card-desc { color: var(--gray-light); }
.platform-card.primary .meta-label { color: var(--gray); }
.platform-card.primary .meta-chips span {
    background: rgba(255,255,255,0.1);
    color: white;
    border-color: rgba(255,255,255,0.2);
}

.card-index {
    position: absolute;
    top: 16px;
    right: 20px;
    font-family: var(--font-mono);
    font-size: 36px;
    font-weight: 900;
    color: var(--border-light);
    line-height: 1;
}

.platform-card.primary .card-index { color: rgba(255,255,255,0.08); }

.card-top {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 20px;
}

.platform-logo {
    width: 52px;
    height: 52px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 14px;
    font-family: var(--font-mono);
    color: white;
    flex-shrink: 0;
}

.logo-okx, .platform-logo.okx { background: var(--black); color: white; border: 1px solid var(--border); }
.logo-binance, .platform-logo.binance { background: #f3ba2f; color: var(--black); }
.logo-bitget, .platform-logo.bitget { background: #00d4ff; color: var(--black); }
.logo-bybit, .platform-logo.bybit { background: #f7a600; color: var(--black); }
.logo-kraken, .platform-logo.kraken { background: #5841d8; color: white; }

.platform-name-wrap {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.platform-name-wrap h3 {
    font-size: 18px;
    font-weight: 700;
}

.platform-tag {
    display: inline-block;
    padding: 2px 8px;
    background: var(--border-light);
    font-size: 11px;
    font-weight: 700;
    border-radius: 2px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    align-self: flex-start;
}

.tag-featured {
    background: var(--yellow);
    color: var(--black);
}

.tag-cyan { background: #00d4ff; color: var(--black); }
.tag-orange { background: #ff6b35; color: white; }
.tag-blue { background: #3b82f6; color: white; }

.card-desc {
    font-size: 14px;
    color: var(--gray-dark);
    line-height: 1.7;
    margin-bottom: 20px;
    min-height: 70px;
}

.card-meta {
    margin-bottom: 20px;
    padding-top: 16px;
    border-top: 1px dashed var(--border-light);
}

.platform-card.primary .card-meta { border-color: var(--border); }

.meta-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
    display: block;
}

.meta-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.meta-chips span {
    padding: 3px 8px;
    background: var(--off-white);
    font-size: 11px;
    font-weight: 700;
    border-radius: 2px;
    font-family: var(--font-mono);
    border: 1px solid var(--border-light);
}

.card-actions {
    display: flex;
    gap: 8px;
}

.card-actions .btn { flex: 1; }

.more-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: var(--off-white);
    border-style: dashed;
}

.card-plus {
    font-size: 48px;
    font-weight: 300;
    color: var(--gray);
    margin-bottom: 12px;
    line-height: 1;
}

.more-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
}

.more-card p {
    font-size: 14px;
    color: var(--gray-dark);
    margin-bottom: 20px;
    max-width: 260px;
}

/* ========================================
   Downloads Section
======================================== */
.downloads-section {
    padding: 100px 0;
    background: var(--off-white);
    border-top: 3px solid var(--black);
    border-bottom: 3px solid var(--black);
}

.device-switcher {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0;
    margin-bottom: 0;
    border: 2px solid var(--black);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    overflow: hidden;
    background: white;
}

.ds-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px;
    border-right: 2px solid var(--border-light);
    transition: all 0.15s var(--ease);
    text-align: left;
}

.ds-btn:last-child { border-right: none; }

.ds-btn:hover { background: var(--off-white); }

.ds-btn.active {
    background: var(--black);
    color: white;
}

.ds-btn.active .ds-icon {
    background: var(--yellow);
    color: var(--black);
}

.ds-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius);
    background: var(--off-white);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.15s var(--ease);
}

.ds-text strong {
    display: block;
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 2px;
}

.ds-text em {
    font-size: 12px;
    color: var(--gray);
    font-style: normal;
    font-family: var(--font-mono);
}

.ds-btn.active .ds-text em { color: var(--gray); }

.device-content {
    background: white;
    border: 2px solid var(--black);
    border-top: none;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    padding: 32px;
}

.dc-panel { display: none; }
.dc-panel.active { display: block; }

.dc-header {
    padding-bottom: 20px;
    border-bottom: 2px solid var(--black);
    margin-bottom: 24px;
}

.dc-header h3 {
    font-size: 22px;
    font-weight: 900;
    margin-bottom: 6px;
    font-family: var(--font-mono);
}

.dc-header p {
    font-size: 14px;
    color: var(--gray-dark);
}

.dl-list {
    display: flex;
    flex-direction: column;
    gap: 0;
    border: 2px solid var(--border-light);
    border-radius: var(--radius);
    overflow: hidden;
}

.dl-item {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 20px;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-light);
    transition: background 0.15s;
}

.dl-item:last-child { border-bottom: none; }
.dl-item:hover { background: var(--off-white); }

.dl-platform {
    display: flex;
    align-items: center;
    gap: 14px;
}

.dl-picon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 12px;
    font-family: var(--font-mono);
    flex-shrink: 0;
}

.dl-picon.okx { background: var(--black); color: white; }
.dl-picon.binance { background: #f3ba2f; color: var(--black); }
.dl-picon.bitget { background: #00d4ff; color: var(--black); }
.dl-picon.bybit { background: #f7a600; color: var(--black); }
.dl-picon.kraken { background: #5841d8; color: white; }

.dl-platform h4 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 2px;
}

.dl-platform p {
    font-size: 12px;
    color: var(--gray);
    font-family: var(--font-mono);
}

.dl-badges {
    display: flex;
    gap: 6px;
}

.badge-official,
.badge-store,
.badge-apple {
    padding: 4px 10px;
    font-size: 11px;
    font-weight: 700;
    border-radius: 2px;
    font-family: var(--font-mono);
    text-transform: uppercase;
}

.badge-official { background: #fef3c7; color: #92400e; border: 1px solid #fde68a; }
.badge-store { background: #dcfce7; color: #166534; border: 1px solid #bbf7d0; }
.badge-apple { background: var(--black); color: white; }

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

.web-step {
    padding: 24px;
    background: var(--off-white);
    border: 2px solid var(--border-light);
    border-left: 4px solid var(--yellow);
    border-radius: var(--radius);
}

.ws-num {
    width: 36px;
    height: 36px;
    background: var(--black);
    color: var(--yellow);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-family: var(--font-mono);
    font-size: 16px;
    margin-bottom: 12px;
}

.web-step h4 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
}

.web-step p {
    font-size: 14px;
    color: var(--gray-dark);
    line-height: 1.7;
}

.download-warning {
    margin-top: 24px;
    display: flex;
    gap: 16px;
    padding: 20px 24px;
    background: #fef2f2;
    border: 2px solid #fecaca;
    border-left: 6px solid #dc2626;
    border-radius: var(--radius);
    font-size: 14px;
    color: #7f1d1d;
    line-height: 1.7;
}

.download-warning strong { color: #450a0a; }

/* ========================================
   Features
======================================== */
.features-section {
    padding: 100px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2px;
    background: var(--border-light);
    border: 2px solid var(--black);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 32px;
}

.feature-item {
    padding: 32px;
    background: white;
    transition: background 0.2s;
    position: relative;
}

.feature-item:hover {
    background: var(--yellow-light);
}

.fi-num {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 900;
    color: var(--gray);
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

.feature-item h3 {
    font-size: 20px;
    font-weight: 900;
    margin-bottom: 10px;
}

.feature-item p {
    font-size: 14px;
    color: var(--gray-dark);
    line-height: 1.7;
    margin-bottom: 16px;
}

.fi-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 700;
    color: var(--black);
    font-family: var(--font-mono);
    text-transform: uppercase;
}

.fi-link:hover {
    gap: 10px;
    color: var(--black);
}

.fi-link span { transition: transform 0.2s; }
.fi-link:hover span { transform: translateX(4px); }

.risk-banner {
    display: flex;
    gap: 20px;
    padding: 24px;
    background: var(--black);
    color: white;
    border-radius: var(--radius-lg);
}

.rb-icon {
    color: var(--yellow);
    flex-shrink: 0;
}

.rb-text h4 {
    font-size: 18px;
    font-weight: 900;
    margin-bottom: 8px;
    color: var(--yellow);
}

.rb-text p {
    font-size: 14px;
    color: var(--gray-light);
    line-height: 1.8;
}

/* ========================================
   Guide Steps
======================================== */
.guide-section {
    padding: 100px 0;
    background: var(--black);
    color: white;
}

.guide-section .section-tag {
    color: var(--yellow);
    border-bottom-color: var(--yellow);
}

.guide-section .section-head h2 { color: white; }
.guide-section .section-desc { color: var(--gray); }

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

.step-block {
    padding: 32px;
    background: var(--black-2);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all 0.2s var(--ease);
    position: relative;
}

.step-block:hover {
    border-color: var(--yellow);
    transform: translateY(-4px);
}

.step-header {
    margin-bottom: 16px;
}

.step-big {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 48px;
    font-weight: 900;
    color: var(--yellow);
    line-height: 1;
    margin-bottom: 12px;
}

.step-header h3 {
    font-size: 20px;
    font-weight: 700;
}

.step-block > p {
    font-size: 14px;
    color: var(--gray-light);
    line-height: 1.7;
    margin-bottom: 16px;
}

.step-block ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.step-block li {
    font-size: 13px;
    color: var(--gray);
    padding-left: 20px;
    position: relative;
}

.step-block li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--yellow);
}

/* ========================================
   Safety Section
======================================== */
.safety-section {
    padding: 100px 0;
    background: var(--yellow);
}

.safety-wrap {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: start;
}

.safety-left h2 {
    font-size: 40px;
    font-weight: 900;
    line-height: 1.1;
    margin: 16px 0 20px;
}

.safety-intro {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 32px;
}

.safety-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.safety-row {
    display: flex;
    gap: 12px;
    padding: 20px;
    background: var(--black);
    color: white;
    border-radius: var(--radius);
}

.sr-check {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--yellow);
    color: var(--black);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    flex-shrink: 0;
}

.safety-row h4 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--yellow);
}

.safety-row p {
    font-size: 13px;
    color: var(--gray-light);
    line-height: 1.6;
}

/* ========================================
   News - 硬性规范
======================================== */
.news-section {
    padding: 100px 0;
}

ul.article-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
    list-style: none;
    margin: 0;
    padding: 0;
    width: 100%;
    box-sizing: border-box;
}

ul.article-cards > li.article-card {
    min-width: 0;
    width: auto;
    max-width: none;
    margin: 0;
    float: none;
    box-sizing: border-box;
    background: white;
    border: 2px solid var(--black);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.2s var(--ease);
}

ul.article-cards > li.article-card:hover {
    transform: translateY(-4px);
    box-shadow: 6px 6px 0 var(--yellow);
}

.article-card .card-thumb {
    width: 100%;
    overflow: hidden;
    aspect-ratio: 16/10;
    border-bottom: 2px solid var(--black);
}

.article-card .card-thumb img {
    display: block;
    width: 100%;
    max-width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

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

.article-card .card-body {
    padding: 20px;
}

.article-card .card-title {
    overflow-wrap: anywhere;
    font-size: 16px;
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 10px;
    color: var(--black);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.article-card .card-date {
    display: block;
    font-size: 12px;
    color: var(--gray);
    font-family: var(--font-mono);
    margin-bottom: 8px;
    text-transform: uppercase;
}

.article-card .card-summary {
    overflow-wrap: anywhere;
    font-size: 13px;
    color: var(--gray-dark);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ========================================
   FAQ
======================================== */
.faq-section {
    padding: 100px 0;
    background: var(--off-white);
    border-top: 3px solid var(--black);
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: white;
    border: 2px solid var(--border-light);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color 0.2s;
}

.faq-item:hover {
    border-color: var(--black);
}

.faq-item.active {
    border-color: var(--black);
}

.faq-q {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    text-align: left;
}

.q-num {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 900;
    color: var(--yellow);
    background: var(--black);
    padding: 4px 8px;
    border-radius: 2px;
    flex-shrink: 0;
}

.q-text {
    flex: 1;
    font-size: 15px;
    font-weight: 700;
}

.q-arrow {
    color: var(--gray);
    flex-shrink: 0;
    transition: transform 0.2s;
}

.faq-item.active .q-arrow {
    transform: rotate(180deg);
    color: var(--yellow);
}

.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s var(--ease);
}

.faq-item.active .faq-a {
    max-height: 400px;
}

.faq-a p {
    padding: 0 24px 20px 80px;
    font-size: 14px;
    color: var(--gray-dark);
    line-height: 1.8;
}

/* ========================================
   About
======================================== */
.about-section {
    padding: 100px 0;
}

.about-inner {
    max-width: 1000px;
    margin: 0 auto;
}

.about-main h2 {
    font-size: 40px;
    font-weight: 900;
    margin: 16px 0 20px;
}

.about-intro {
    font-size: 16px;
    color: var(--gray-dark);
    line-height: 1.8;
    margin-bottom: 40px;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.about-item {
    padding: 24px;
    border: 2px solid var(--border-light);
    border-radius: var(--radius);
    transition: all 0.2s;
}

.about-item:hover {
    border-color: var(--black);
    background: var(--yellow-light);
}

.ai-icon {
    width: 44px;
    height: 44px;
    background: var(--black);
    color: var(--yellow);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.about-item h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 6px;
}

.about-item p {
    font-size: 13px;
    color: var(--gray-dark);
    line-height: 1.6;
}

.about-disclaimer {
    padding: 24px;
    background: var(--black);
    color: white;
    border-radius: var(--radius-lg);
    border-left: 6px solid var(--yellow);
}

.about-disclaimer h4 {
    font-size: 16px;
    font-weight: 900;
    color: var(--yellow);
    margin-bottom: 12px;
}

.about-disclaimer p {
    font-size: 13px;
    color: var(--gray-light);
    line-height: 1.8;
    margin-bottom: 8px;
}

.about-disclaimer p:last-child { margin-bottom: 0; }

/* ========================================
   Contact
======================================== */
.contact-section {
    padding: 100px 0;
    background: var(--black);
    color: white;
}

.contact-box {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    background: var(--black-2);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 48px;
}

.contact-section .section-tag { color: var(--yellow); border-bottom-color: var(--yellow); }

.contact-info h2 {
    font-size: 36px;
    font-weight: 900;
    margin: 16px 0 16px;
}

.contact-info > p {
    font-size: 15px;
    color: var(--gray-light);
    line-height: 1.8;
    margin-bottom: 32px;
}

.ci-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 28px;
}

.ci-item {
    display: flex;
    gap: 16px;
    align-items: center;
}

.ci-icon {
    width: 48px;
    height: 48px;
    background: var(--yellow);
    color: var(--black);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.ci-item span {
    display: block;
    font-size: 12px;
    color: var(--gray);
    text-transform: uppercase;
    font-family: var(--font-mono);
    letter-spacing: 0.05em;
}

.ci-item strong,
.ci-phone {
    font-size: 20px;
    font-weight: 900;
    color: white;
}

.ci-phone:hover { color: var(--yellow); }

.ci-notice {
    display: flex;
    gap: 10px;
    padding: 16px;
    background: rgba(250,204,21,0.1);
    border: 1px solid rgba(250,204,21,0.3);
    border-radius: var(--radius);
    font-size: 13px;
    color: var(--gray-light);
    line-height: 1.6;
}

.ci-notice svg { color: var(--yellow); flex-shrink: 0; }

.contact-form {
    background: var(--black-3);
    padding: 32px;
    border-radius: var(--radius);
    border: 2px solid var(--border);
}

.contact-form h3 {
    font-size: 22px;
    font-weight: 900;
    margin-bottom: 24px;
}

.cf-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.cf-group {
    margin-bottom: 16px;
}

.cf-group label {
    display: block;
    font-size: 12px;
    font-weight: 700;
    color: var(--gray-light);
    margin-bottom: 8px;
    text-transform: uppercase;
    font-family: var(--font-mono);
    letter-spacing: 0.05em;
}

.cf-group input,
.cf-group select,
.cf-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--black-4);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    color: white;
    font-size: 14px;
    transition: border-color 0.2s;
}

.cf-group input:focus,
.cf-group select:focus,
.cf-group textarea:focus {
    outline: none;
    border-color: var(--yellow);
}

.cf-group textarea { resize: vertical; min-height: 100px; }

.cf-tip {
    margin-top: 12px;
    font-size: 12px;
    color: var(--gray);
    text-align: center;
}

.contact-form .btn-yellow {
    color: var(--black);
}

/* ========================================
   Footer
======================================== */
.site-footer {
    background: var(--black);
    color: white;
}

.footer-top {
    padding: 64px 0 48px;
    border-bottom: 1px solid var(--border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 20px;
}

.brand-mark.lg {
    padding: 10px 16px;
    font-size: 20px;
}

.footer-brand h4 {
    font-size: 20px;
    font-weight: 900;
}

.footer-brand p {
    font-size: 12px;
    color: var(--gray);
}

.footer-desc {
    font-size: 14px;
    color: var(--gray-light);
    line-height: 1.8;
    margin-bottom: 24px;
}

.footer-contact-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-phone {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
    font-weight: 900;
    color: var(--yellow);
}

.footer-time {
    font-size: 12px;
    color: var(--gray);
}

.footer-title {
    font-size: 14px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 20px;
    font-family: var(--font-mono);
}

.footer-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-list a {
    font-size: 14px;
    color: var(--gray-light);
}

.footer-list a:hover {
    color: var(--yellow);
}

.footer-bottom {
    padding: 24px 0;
}

.footer-bottom-inner {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-links-row {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.footer-links-row a {
    font-size: 13px;
    color: var(--gray);
}

.footer-links-row a:hover {
    color: var(--yellow);
}

.copyright {
    font-size: 12px;
    color: var(--gray);
    line-height: 1.8;
}

/* ========================================
   Article Detail
======================================== */
.article-page {
    padding: 40px 0 80px;
    background: var(--off-white);
}

.article-bread {
    margin-bottom: 24px;
    font-size: 14px;
    color: var(--gray);
}

.article-bread a { color: var(--gray-dark); }
.article-bread a:hover { color: var(--black); }

.article-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 32px;
    align-items: start;
}

.article-main {
    background: white;
    border: 2px solid var(--black);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.article-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 900;
    background: var(--yellow);
    color: var(--black);
    padding: 4px 10px;
    margin-bottom: 16px;
    letter-spacing: 0.1em;
}

.article-title {
    font-size: 30px;
    font-weight: 900;
    line-height: 1.3;
    margin-bottom: 16px;
}

.article-meta-bar {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-light);
    font-size: 13px;
    color: var(--gray);
    font-family: var(--font-mono);
}

.meta-time {
    display: flex;
    align-items: center;
    gap: 6px;
}

.article-summary-block {
    padding: 20px;
    background: var(--yellow-light);
    border-left: 4px solid var(--yellow);
    border-radius: var(--radius);
    margin-bottom: 24px;
}

.summary-label {
    display: inline-block;
    font-size: 11px;
    font-weight: 900;
    font-family: var(--font-mono);
    color: var(--black);
    background: var(--yellow);
    padding: 2px 8px;
    margin-bottom: 8px;
    letter-spacing: 0.05em;
}

.article-summary-block p {
    font-size: 15px;
    color: var(--black);
    line-height: 1.8;
}

.article-cover-block {
    margin-bottom: 32px;
    border-radius: var(--radius);
    overflow: hidden;
    border: 2px solid var(--border-light);
}

.article-cover-block img {
    width: 100%;
}

.article-content {
    font-size: 16px;
    line-height: 1.9;
}

.article-content h2,
.article-content h3,
.article-content h4 {
    margin-top: 36px;
    margin-bottom: 16px;
    font-weight: 900;
}

.article-content h2 { font-size: 26px; }
.article-content h3 { font-size: 22px; }
.article-content h4 { font-size: 18px; }

.article-content p { margin-bottom: 20px; }

.article-content ul,
.article-content ol {
    margin-bottom: 20px;
    padding-left: 24px;
}

.article-content li { margin-bottom: 8px; }

.article-content img {
    max-width: 100%;
    border-radius: var(--radius);
    margin: 24px 0;
    border: 2px solid var(--border-light);
}

.article-content blockquote {
    padding: 20px 24px;
    background: var(--off-white);
    border-left: 4px solid var(--black);
    margin: 24px 0;
    font-size: 15px;
    color: var(--gray-dark);
    border-radius: var(--radius);
}

.article-risk-tip {
    display: flex;
    gap: 12px;
    margin-top: 40px;
    padding: 20px;
    background: #fef2f2;
    border: 2px solid #fecaca;
    border-left: 6px solid #dc2626;
    border-radius: var(--radius);
    font-size: 13px;
    color: #7f1d1d;
    line-height: 1.6;
}

.article-side {
    position: sticky;
    top: 100px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.side-card {
    background: white;
    border: 2px solid var(--black);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.side-title {
    font-size: 14px;
    font-weight: 900;
    text-transform: uppercase;
    font-family: var(--font-mono);
    letter-spacing: 0.1em;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--black);
    margin-bottom: 16px;
}

.side-links {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.side-links a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    font-size: 14px;
    color: var(--gray-dark);
    border-radius: var(--radius);
}

.side-links a span {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--gray);
    font-weight: 700;
}

.side-links a:hover {
    background: var(--yellow-light);
    color: var(--black);
}

.side-cta {
    background: var(--black);
    color: white;
    border-color: var(--black);
}

.side-cta h4 {
    font-size: 18px;
    font-weight: 900;
    margin-bottom: 8px;
}

.side-cta p {
    font-size: 13px;
    color: var(--gray-light);
    margin-bottom: 16px;
    line-height: 1.6;
}

.ss-head {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    color: var(--black);
}

.ss-head h4 {
    font-size: 14px;
    font-weight: 900;
}

.side-security ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.side-security li {
    font-size: 13px;
    color: var(--gray-dark);
    padding-left: 16px;
    position: relative;
}

.side-security li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--black);
    font-weight: 900;
}

.article-bottom-cta {
    margin-top: 32px;
    padding: 32px;
    background: var(--black);
    color: white;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.article-bottom-cta h3 {
    font-size: 22px;
    font-weight: 900;
    margin-bottom: 4px;
}

.article-bottom-cta p {
    font-size: 14px;
    color: var(--gray-light);
}

.ab-btns {
    display: flex;
    gap: 12px;
    flex-shrink: 0;
}

/* ========================================
   Responsive
======================================== */
@media (max-width: 1024px) {
    .hero-title { font-size: 52px; }
    .hero-inner { grid-template-columns: 1fr; }
    .hero-right { max-width: 500px; margin: 0 auto; }
    .platforms-grid,
    .features-grid,
    .steps-grid,
    .safety-list,
    .about-grid,
    .web-grid { grid-template-columns: repeat(2, 1fr); }
    .features-grid { gap: 0; }
    .device-switcher { grid-template-columns: repeat(3, 1fr); }
    .safety-wrap { grid-template-columns: 1fr; gap: 40px; }
    .contact-box { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
    .article-layout { grid-template-columns: 1fr; }
    .article-side { position: static; }
}

@media (max-width: 768px) {
    .ann-text span:not(svg) { display: none; }
    .ann-text::after { content: '请通过官方渠道获取客户端'; font-size: 12px; }
    .main-nav {
        display: none;
        position: fixed;
        top: 105px;
        left: 0; right: 0;
        background: var(--black);
        padding: 20px;
        border-bottom: 2px solid var(--yellow);
        z-index: 99;
    }
    .main-nav.active { display: block; }
    .main-nav ul { flex-direction: column; gap: 0; }
    .main-nav a { padding: 14px 16px; border-bottom: 1px solid var(--border); }
    .nav-cta a { margin-left: 0; margin-top: 12px; text-align: center; }
    .menu-toggle { display: flex; }
    .hero { padding: 40px 0 60px; }
    .hero-title { font-size: 40px; }
    .hero-ctas { flex-direction: column; }
    .hero-ctas .btn { width: 100%; }
    .hero-meta { flex-direction: column; gap: 16px; }
    .strip-sep { display: none; }
    .strip-inner { gap: 12px; font-size: 12px; }
    .section-head { flex-direction: column; align-items: flex-start; }
    .section-head h2 { font-size: 28px; }
    .platforms-section,
    .downloads-section,
    .features-section,
    .guide-section,
    .safety-section,
    .news-section,
    .faq-section,
    .about-section,
    .contact-section { padding: 60px 0; }
    .platforms-grid,
    .features-grid,
    .steps-grid,
    .safety-list,
    .about-grid,
    .web-grid { grid-template-columns: 1fr; }
    .device-switcher { grid-template-columns: 1fr; }
    .ds-btn { border-right: none; border-bottom: 2px solid var(--border-light); }
    .ds-btn:last-child { border-bottom: none; }
    .device-content { padding: 20px; }
    .dl-item { grid-template-columns: 1fr; gap: 12px; }
    .dl-badges { flex-wrap: wrap; }
    .safety-card,
    .contact-box,
    .article-main { padding: 24px; }
    .cf-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .article-title { font-size: 24px; }
    .article-bottom-cta { flex-direction: column; text-align: center; }
    .ab-btns { flex-direction: column; width: 100%; }
    .faq-a p { padding-left: 24px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    html { scroll-behavior: auto; }
}