/* 变量定义 (继承首页视觉契约) */
:root {
    --color-bg: #090a10;
    --color-bg-alt: #121420;
    --color-primary: #2f34d1;
    --color-primary-light: #5257f5;
    --color-primary-glow: rgba(47, 52, 209, 0.3);
    --color-text-main: #f1f5f9;
    --color-text-muted: #94a3b8;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-vault-bg: rgba(255, 255, 255, 0.02);
    --color-success: #10b981;
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --radius-base: 12px;
    --radius-sm: 8px;
    --transition: all 0.15s ease;
}

/* 基础重置与排版规范 */
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    background-color: var(--color-bg);
    color: var(--color-text-main);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    word-break: break-word;
    overflow-wrap: break-word;
}
a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; height: auto; display: block; }

/* 布局核心规则 */
.mantle-tube {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow: hidden;
}
.tube-bound {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding-left: clamp(1.5rem, 5vw, 3rem);
    padding-right: clamp(1.5rem, 5vw, 3rem);
}
.cluster-flex {
    display: flex;
    flex-wrap: wrap;
    min-width: 0;
}
.cluster-col {
    display: flex;
    flex-direction: column;
    flex-wrap: wrap;
    min-width: 0;
}

/* =========================================
   复用首页导航栏样式 (Crown Helm)
   ========================================= */
.crown-helm {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(9, 10, 16, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}
.helm-layout {
    align-items: center;
    justify-content: space-between;
    height: 72px;
}
.sigil-mark {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}
.sigil-mark img {
    height: 32px;
    width: auto;
}
.route-mesh {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    min-width: 0;
}
.route-wire {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 0;
    position: relative;
}
.route-wire:hover {
    color: var(--color-text-main);
}
.route-wire.active {
    color: var(--color-text-main);
}
.route-wire.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-primary);
    border-radius: 2px;
}
.pulse-key {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    cursor: pointer;
    text-align: center;
    white-space: normal;
}
.pulse-primary {
    border-radius: var(--radius-sm);
    font-weight: 600;
    background-color: var(--color-primary);
    color: #fff;
    border: 1px solid transparent;
    box-shadow: 0 4px 14px var(--color-primary-glow);
}
.pulse-primary:hover, .pulse-primary:focus {
    background-color: var(--color-primary-light);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(82, 87, 245, 0.4);
}

@media (max-width: 768px) {
    .route-mesh { display: none; } /* 移动端简易处理，重点在正文 */
}

/* =========================================
   内页正文通用视觉语法 (Data UI)
   ========================================= */
.tube-core {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}
.apex-super {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    white-space: normal;
    background: linear-gradient(135deg, #fff 0%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.apex-major {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--color-text-main);
    white-space: normal;
}
.apex-minor {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-main);
    white-space: normal;
}
.cipher-lead {
    font-size: clamp(1.125rem, 2vw, 1.35rem);
    color: var(--color-text-muted);
    max-width: 720px;
    line-height: 1.7;
}
.cipher-base {
    color: var(--color-text-muted);
    font-size: 1rem;
}
.glyph-vector {
    fill: currentColor;
    flex-shrink: 0;
}
.belt-divider {
    height: 1px;
    background: var(--color-border);
    width: 100%;
    margin: 2rem 0;
}

/* =========================================
   区块 1: 军事级加密防御体系 (Hero Intro)
   ========================================= */
.cloak-intro {
    padding: calc(clamp(3rem, 8vw, 6rem) * 1.5) 0 clamp(3rem, 8vw, 6rem);
    position: relative;
    overflow: hidden;
}
.cloak-intro::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: 
        radial-gradient(circle at 50% 0%, rgba(47, 52, 209, 0.15) 0%, transparent 60%),
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 100% 100%, 40px 40px, 40px 40px;
    z-index: 0;
    pointer-events: none;
}
.cloak-layout {
    position: relative;
    z-index: 1;
    align-items: center;
    gap: 4rem;
}
.cloak-cipher {
    flex: 1 1 500px;
    gap: 1.5rem;
}
.cloak-data {
    flex: 1 1 400px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
}
.vault-metric {
    background: rgba(18, 20, 32, 0.6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-base);
    padding: 1.5rem;
    backdrop-filter: blur(8px);
    transition: var(--transition);
}
.vault-metric:hover {
    border-color: rgba(82, 87, 245, 0.5);
    background: rgba(18, 20, 32, 0.9);
}
.vault-metric .cipher-value {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary-light);
    line-height: 1;
    margin-bottom: 0.5rem;
}
.vault-metric .cipher-seal {
    font-size: 0.875rem;
    color: var(--color-text-main);
    font-weight: 600;
}
.vault-metric .cipher-desc {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: 0.5rem;
}

/* =========================================
   区块 2: 次世代 VPN 加密协议 (Feature Comparison)
   ========================================= */
.zone-comparison {
    padding: clamp(3rem, 6vw, 5rem) 0;
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}
.zone-crown {
    text-align: center;
    margin-bottom: 4rem;
    gap: 1rem;
    align-items: center;
}
.zone-body {
    gap: 4rem;
    align-items: flex-start;
}
.lens-mantle {
    flex: 1 1 500px;
    border-radius: var(--radius-base);
    overflow: hidden;
    border: 1px solid var(--color-border);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    position: relative;
}
.lens-mantle::after {
    content: '';
    position: absolute;
    inset: 0;
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.05);
    border-radius: var(--radius-base);
    pointer-events: none;
}
.lens {
    width: 100%;
    display: block;
    object-fit: cover;
}
.node-cluster {
    flex: 1 1 400px;
    gap: 1.5rem;
}
.node-protocol {
    background: var(--color-vault-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-base);
    padding: 2rem;
    transition: var(--transition);
}
.node-protocol:hover {
    background: rgba(255, 255, 255, 0.04);
    transform: translateY(-2px);
}
.node-head {
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}
.node-glyph {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(47, 52, 209, 0.1);
    border: 1px solid rgba(47, 52, 209, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary-light);
}
.belt-status {
    display: flex;
    gap: 4px;
    margin-top: 1.5rem;
}
.belt-segment {
    height: 4px;
    flex: 1;
    background: var(--color-border);
    border-radius: 2px;
}
.belt-segment.active {
    background: var(--color-success);
}
.belt-segment.primary {
    background: var(--color-primary);
}

/* =========================================
   区块 3: 纯粹的无日志承诺 (Policy Proof)
   ========================================= */
.veil-proof {
    padding: clamp(4rem, 8vw, 6rem) 0;
    position: relative;
}
.proof-layout {
    gap: 3rem;
    align-items: center;
}
.proof-mantle {
    flex: 1 1 400px;
    gap: 1.5rem;
}
.proof-visual {
    flex: 1 1 500px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-base);
    border: 1px solid var(--color-border);
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
}
.flow-mesh {
    gap: 1rem;
    position: relative;
}
.flow-blip {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    z-index: 2;
}
.flow-blip .glyph-vector {
    color: var(--color-text-muted);
}
.flow-blip.wipe .glyph-vector {
    color: #ef4444; /* Red for wipe/destroy */
}
.flow-blip.secure .glyph-vector {
    color: var(--color-success);
}
.flow-wire {
    position: absolute;
    left: 2rem;
    top: 2rem;
    bottom: 2rem;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-border) 50%, rgba(239, 68, 68, 0.5) 100%);
    z-index: 1;
}

/* =========================================
   区块 4: 动态 IP 掩蔽引擎 (Module Context)
   ========================================= */
.aura-context {
    padding: clamp(3rem, 6vw, 5rem) 0;
    background: radial-gradient(ellipse at top, var(--color-bg-alt) 0%, var(--color-bg) 100%);
    border-top: 1px solid var(--color-border);
}
.context-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}
.cell-module {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-base);
    padding: 2.5rem 2rem;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
}
.cell-module:hover {
    border-color: var(--color-text-muted);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}
.cell-glyph {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.01) 100%);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-main);
    margin-bottom: 0.5rem;
}

/* =========================================
   页脚 (Sole Anchor)
   ========================================= */
.sole-anchor {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    padding: 4rem 0 2rem;
    margin-top: auto;
}
.anchor-layout {
    justify-content: space-between;
    gap: 3rem;
}
.anchor-brand {
    gap: 1rem;
    max-width: 320px;
}
.anchor-brand span {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-text-main);
}
.anchor-mesh {
    gap: 4rem;
}
.anchor-cluster {
    gap: 1rem;
}
.anchor-cluster strong {
    color: var(--color-text-main);
    font-size: 1rem;
    margin-bottom: 0.5rem;
}
.anchor-wire {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    transition: var(--transition);
}
.anchor-wire:hover {
    color: var(--color-primary-light);
}
.anchor-bottom {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

@media (max-width: 1024px) {
    .cloak-layout, .zone-body, .proof-layout {
        flex-direction: column;
    }
    .lens-mantle { width: 100%; }
}

.helm-crown-helm {
    font-family: var(--font-sans);
    line-height: 1.6;
    word-break: break-word;
    color: var(--color-text-main);
}
.helm-crown-helm,
.helm-crown-helm *,
.helm-crown-helm *::before,
.helm-crown-helm *::after {
    box-sizing: border-box;
}

.helm-crown-helm nav,
.helm-crown-helm div,
.helm-crown-helm section,
.helm-crown-helm article,
.helm-crown-helm aside,
.helm-crown-helm p,
.helm-crown-helm h1,
.helm-crown-helm h2,
.helm-crown-helm h3,
.helm-crown-helm h4,
.helm-crown-helm h5,
.helm-crown-helm h6,
.helm-crown-helm a {
    margin: 0;
    padding: 0;
    font: inherit;
    color: inherit;
    letter-spacing: inherit;
    line-height: inherit;
}

.helm-crown-helm p,
.helm-crown-helm h1,
.helm-crown-helm h2,
.helm-crown-helm h3,
.helm-crown-helm h4,
.helm-crown-helm h5,
.helm-crown-helm h6 {
    text-decoration: none;
}

.helm-crown-helm img {
    display: block;
    max-width: 100%;
    height: auto;
    border: 0;
}

.helm-crown-helm {
    box-shadow: none;
    filter: none;
    text-shadow: none;
    background-image: none;
    border-top: none;
    border-left: none;
    border-right: none;
    outline: none;
}

.helm-crown-helm a.helm-route-wire {
    --aisite-shell-nav-padding: 0.5rem 0;
    --aisite-shell-nav-margin: 0;
    --aisite-shell-nav-line-height: normal;
    --aisite-shell-nav-display: inline;
    --aisite-shell-nav-height: auto;
    --aisite-shell-nav-min-height: auto;
}

.helm-crown-helm a.helm-route-wire,
.helm-crown-helm a.helm-route-wire:hover,
.helm-crown-helm a.helm-route-wire:focus,
.helm-crown-helm a.helm-route-wire:active,
.helm-crown-helm a.helm-route-wire.active,
.helm-crown-helm a.helm-route-wire[aria-current="page"] {
    background: transparent;
    border: none;
    border-bottom: none;
    box-shadow: none;
    outline: none;
    text-decoration: none;
    padding: var(--aisite-shell-nav-padding, 0);
    margin: var(--aisite-shell-nav-margin, 0);
    line-height: var(--aisite-shell-nav-line-height, normal);
    display: var(--aisite-shell-nav-display, inline);
    height: var(--aisite-shell-nav-height, auto);
    min-height: var(--aisite-shell-nav-min-height, auto);
}

.helm-crown-helm .helm-cluster-flex{
            display: flex;
            flex-wrap: wrap;
            min-width: 0;
        }

.helm-crown-helm .helm-tube-bound{
            width: 100%;
            max-width: 1360px;
            margin: 0 auto;
            padding-left: clamp(1rem, 4vw, 2rem);
            padding-right: clamp(1rem, 4vw, 2rem);
        }

.helm-crown-helm{
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(9, 10, 16, 0.8);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 1rem 0;
        }

.helm-crown-helm .helm-helm-layout{
            justify-content: space-between;
            align-items: center;
            gap: 2rem;
        }

.helm-crown-helm .helm-sigil-mark{
            display: flex;
            align-items: center;
            height: 32px;
        }

.helm-crown-helm .helm-sigil-mark img{
            height: 100%;
            object-fit: contain;
        }

.helm-crown-helm .helm-route-mesh{
            display: flex;
            gap: 2rem;
            align-items: center;
        }

.helm-crown-helm .helm-route-wire{
            font-size: 0.95rem;
            font-weight: 500;
            color: #94a3b8;
            padding: 0.5rem 0;
            position: relative;
        }

.helm-crown-helm .helm-route-wire:hover{
            color: #f1f5f9;
        }

.helm-crown-helm .helm-route-wire.active{
            color: #f1f5f9;
        }

.helm-crown-helm .helm-route-wire.active::after{
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: #2f34d1;
            border-radius: 2px;
        }

@media (max-width: 768px){.helm-crown-helm .helm-route-mesh{
                display: none; 
            }}

.helm-crown-helm .helm-pulse-key{
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.875rem 1.75rem;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            border: 1px solid transparent;
            gap: 0.5rem;
        }

.helm-crown-helm .helm-pulse-primary{
            background-color: #2f34d1;
            color: #fff;
            box-shadow: 0 4px 14px rgba(47, 52, 209, 0.3);
        }

.helm-crown-helm .helm-pulse-primary:hover{
            background-color: #5257f5;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(47, 52, 209, 0.3);
        }

.helm-crown-helm {
    background: rgb(9, 10, 16);
    background-image: none;
}

.anchor-sole-anchor {
    font-family: var(--font-sans);
    line-height: 1.6;
    word-break: break-word;
    color: var(--color-text-main);
}
.anchor-sole-anchor,
.anchor-sole-anchor *,
.anchor-sole-anchor *::before,
.anchor-sole-anchor *::after {
    box-sizing: border-box;
}

.anchor-sole-anchor nav,
.anchor-sole-anchor div,
.anchor-sole-anchor section,
.anchor-sole-anchor article,
.anchor-sole-anchor aside,
.anchor-sole-anchor p,
.anchor-sole-anchor h1,
.anchor-sole-anchor h2,
.anchor-sole-anchor h3,
.anchor-sole-anchor h4,
.anchor-sole-anchor h5,
.anchor-sole-anchor h6,
.anchor-sole-anchor a {
    margin: 0;
    padding: 0;
    font: inherit;
    color: inherit;
    letter-spacing: inherit;
    line-height: inherit;
}

.anchor-sole-anchor p,
.anchor-sole-anchor h1,
.anchor-sole-anchor h2,
.anchor-sole-anchor h3,
.anchor-sole-anchor h4,
.anchor-sole-anchor h5,
.anchor-sole-anchor h6 {
    text-decoration: none;
}

.anchor-sole-anchor img {
    display: block;
    max-width: 100%;
    height: auto;
    border: 0;
}

.anchor-sole-anchor {
    box-shadow: none;
    filter: none;
    text-shadow: none;
    background-image: none;
    border-top: none;
    border-left: none;
    border-right: none;
    outline: none;
}

.anchor-sole-anchor a,
.anchor-sole-anchor a:hover,
.anchor-sole-anchor a:focus,
.anchor-sole-anchor a:active {
    background: transparent;
    box-shadow: none;
    outline: none;
    text-decoration: none;
}

.anchor-sole-anchor .anchor-cluster-flex{
            display: flex;
            flex-wrap: wrap;
            min-width: 0;
        }

.anchor-sole-anchor .anchor-tube-bound{
            width: 100%;
            max-width: 1360px;
            margin: 0 auto;
            padding-left: clamp(1rem, 4vw, 2rem);
            padding-right: clamp(1rem, 4vw, 2rem);
        }

.anchor-sole-anchor{
            background: #050608;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 4rem 0 2rem;
            margin-top: auto;
        }

.anchor-sole-anchor .anchor-base-cluster{
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 4rem;
            margin-bottom: 3rem;
        }

@media (max-width: 768px){.anchor-sole-anchor .anchor-base-cluster{
                grid-template-columns: 1fr;
                gap: 2rem;
            }}

.anchor-sole-anchor .anchor-root-brand{
            font-size: 1.5rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: #fff;
            margin-bottom: 1rem;
        }

.anchor-sole-anchor .anchor-root-cipher{
            color: #94a3b8;
            font-size: 0.9rem;
            max-width: 400px;
        }

.anchor-sole-anchor .anchor-root-apex{
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            white-space: normal;
        }

.anchor-sole-anchor .anchor-cluster-links{
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

.anchor-sole-anchor .anchor-root-wire{
            color: #94a3b8;
            font-size: 0.9rem;
        }

.anchor-sole-anchor .anchor-root-wire:hover{
            color: #5257f5;
        }

.anchor-sole-anchor .anchor-base-legal{
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: #94a3b8;
            font-size: 0.85rem;
        }