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

:root {
    --bg-deep: #020617;
    --bg-panel: #02081f;
    --bg-soft: #0b1535;
    --accent: #3b82f6;
    --accent-soft: #1d4ed8;
    --accent-cyan: #22d3ee;
    --text-main: #e5e7eb;
    --text-sub: #9ca3af;
    --border-soft: rgba(148, 163, 184, 0.3);
    --radius-lg: 20px;
    --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.5);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg-deep);
    color: var(--text-main);
    line-height: 1.6;
}

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

.page-gradient {
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(circle at 10% 0%, rgba(59, 130, 246, 0.4), transparent 55%),
        radial-gradient(circle at 80% 80%, rgba(56, 189, 248, 0.35), transparent 60%),
        linear-gradient(180deg, #020617 0%, #02081f 50%, #020617 100%);
}

.shell {
    width: 100%;
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 24px;
}

.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.55s ease, transform 0.55s ease;
}

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

.reveal-delay-1 {
    transition-delay: 0.06s;
}

.reveal-delay-2 {
    transition-delay: 0.12s;
}

.reveal-delay-3 {
    transition-delay: 0.18s;
}


/* 头部导航 */
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(18px);
    background: radial-gradient(circle at 0 0, rgba(59, 130, 246, 0.35), transparent 55%),
        rgba(2, 8, 23, 0.92);
    border-bottom: 1px solid rgba(15, 23, 42, 0.9);
}

.header-shell {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

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

.brand-mark {
    position: relative;
    width: 34px;
    height: 34px;
    border-radius: 999px;
    background: radial-gradient(circle at 30% 20%, #22d3ee, #1d4ed8);
    box-shadow: 0 0 0 1px rgba(148, 163, 184, 0.5), 0 0 28px rgba(56, 189, 248, 0.6);
    overflow: hidden;
}

.brand-mark.small {
    width: 28px;
    height: 28px;
}

.mark-orbit {
    position: absolute;
    inset: 45% -30%;
    border-radius: 999px;
    border: 1px solid rgba(191, 219, 254, 0.6);
    opacity: 0.7;
}

.mark-core {
    position: absolute;
    inset: 22%;
    border-radius: 999px;
    background: radial-gradient(circle at 30% 20%, #e5e7eb, #60a5fa);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-size: 15px;
    font-weight: 600;
}

.brand-sub {
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-sub);
}

.main-nav {
    display: flex;
    gap: 28px;
    font-size: 14px;
}

.nav-link {
    position: relative;
    padding: 4px 0;
    color: var(--text-sub);
}

.nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 0;
    height: 2px;
    border-radius: 999px;
    background: linear-gradient(90deg, #22d3ee, #3b82f6);
    transition: width 0.22s ease;
}

.nav-link:hover,
.nav-link.active {
    color: #f9fafb;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.header-contact {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    font-size: 11px;
    color: var(--text-sub);
}

.contact-phone {
    font-size: 14px;
    font-weight: 600;
    color: #e5e7eb;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: 4px 0 4px 10px;
}

.nav-toggle span {
    width: 20px;
    height: 1.5px;
    border-radius: 999px;
    background: #e5e7eb;
}

/* 通用按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 22px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary {
    background: linear-gradient(90deg, #22d3ee, #3b82f6);
    box-shadow: 0 14px 35px rgba(37, 99, 235, 0.6);
    color: #0b1120;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 18px 45px rgba(37, 99, 235, 0.8);
}

.btn-ghost {
    background: transparent;
    border-color: rgba(148, 163, 184, 0.6);
    color: var(--text-main);
}

.btn-ghost:hover {
    border-color: #60a5fa;
    background: rgba(15, 23, 42, 0.7);
}

.btn-full {
    width: 100%;
}

/* 首屏区域 */
.hero {
    padding: 96px 0 80px;
}

.hero-shell {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 56px;
    align-items: center;
}

.hero-text {
    padding: 24px 22px 26px;
    border-radius: 24px;
    background: rgba(15, 23, 42, 0.78);
    border: 1px solid rgba(148, 163, 184, 0.45);
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.7);
}


.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.5);
    background: rgba(15, 23, 42, 0.7);
    font-size: 11px;
    color: var(--text-sub);
}

.badge-dot {
    width: 7px;
    height: 7px;
    border-radius: 999px;
    background: radial-gradient(circle at 30% 20%, #facc15, #f97316);
    box-shadow: 0 0 14px rgba(249, 115, 22, 0.8);
}

.hero-title {
    margin-top: 18px;
    font-size: 34px;
    font-weight: 600;
}

.hero-title span {
    display: block;
}

.hero-highlight {
    font-size: 38px;
    background: linear-gradient(90deg, #e5e7eb, #60a5fa);
    -webkit-background-clip: text;
    color: transparent;
}

.hero-desc {
    margin-top: 18px;
    font-size: 14px;
    color: var(--text-sub);
}

.hero-actions {
    display: flex;
    gap: 14px;
    margin-top: 26px;
}

.hero-meta {
    margin-top: 26px;
    display: grid;
    gap: 10px;
}

.meta-item {
    display: flex;
    gap: 10px;
    font-size: 12px;
    color: var(--text-sub);
}

.meta-label {
    min-width: 64px;
    color: #9ca3af;
}

.meta-value {
    color: #e5e7eb;
}

/* 首屏右侧图形 */
.hero-graphic {
    position: relative;
    padding: 32px 18px 36px;
    border-radius: 26px;
    background: radial-gradient(circle at 20% 0, rgba(56, 189, 248, 0.35), transparent 55%),
        radial-gradient(circle at 100% 120%, rgba(59, 130, 246, 0.3), transparent 55%),
        #02081f;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(148, 163, 184, 0.5);
}

.graphic-ring {
    position: relative;
    margin-bottom: 18px;
    padding: 12px 18px;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.8));
    border: 1px solid rgba(148, 163, 184, 0.5);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    overflow: hidden;
}

.graphic-ring::before {
    content: "";
    position: absolute;
    inset: -60%;
    background: radial-gradient(circle at 0 0, rgba(56, 189, 248, 0.8), transparent 55%);
    opacity: 0;
    transition: opacity 0.35s ease;
}

.graphic-ring.active::before {
    opacity: 1;
}

.ring-title {
    font-size: 13px;
    font-weight: 500;
}

.ring-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: flex-end;
}

.ring-tags span {
    padding: 3px 10px;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid rgba(148, 163, 184, 0.6);
    font-size: 11px;
}

.graphic-axis {
    margin-top: 14px;
    text-align: center;
    font-size: 11px;
    color: var(--text-sub);
}

/* 核心能力 & 方案区块 */
.section-shell {
    padding: 54px 0 40px;
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 32px;
}

.section-title {
    position: relative;
    display: inline-block;
    font-size: 26px;
    font-weight: 600;
    letter-spacing: 0.04em;
}

.section-title::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 40px;
    height: 2px;
    border-radius: 999px;
    background: linear-gradient(90deg, #22d3ee, #3b82f6);
}

.section-desc {
    margin-top: 10px;
    font-size: 14px;
    color: var(--text-sub);
}

.core {
    background: radial-gradient(circle at 0 100%, rgba(37, 99, 235, 0.4), transparent 60%),
        #020617;
}

.core-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}

.core-card {
    padding: 20px 18px 18px;
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, rgba(15, 23, 42, 0.96), rgba(15, 23, 42, 0.92));
    border: 1px solid var(--border-soft);
}

.core-card h3 {
    font-size: 16px;
    margin-bottom: 8px;
}

.core-card p {
    font-size: 13px;
    color: var(--text-sub);
    margin-bottom: 10px;
}

.core-card ul {
    list-style: none;
    font-size: 12px;
    color: var(--text-main);
}

.core-card li + li {
    margin-top: 4px;
}

.solution {
    background: radial-gradient(circle at 100% 0, rgba(37, 99, 235, 0.4), transparent 55%),
        #020617;
}

.section-header-inline {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 24px;
}

.solution-steps {
    display: flex;
    gap: 18px;
    font-size: 12px;
}

.step {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid rgba(148, 163, 184, 0.5);
}

.core-card,
.solution-card,
.contact-panel {
    transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}

.core-card:hover,
.solution-card:hover,
.contact-panel:hover {
    transform: translateY(-4px);
    border-color: rgba(191, 219, 254, 0.9);
    box-shadow: 0 22px 55px rgba(15, 23, 42, 0.85);
    background: linear-gradient(145deg, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.94));
}

.step-index {
    font-weight: 600;
    color: #60a5fa;
}

.solution-grid {
    margin-top: 26px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}

.solution-card {
    padding: 20px 18px 18px;
    border-radius: var(--radius-lg);
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid var(--border-soft);
}

.solution-card h3 {
    font-size: 16px;
    margin-bottom: 8px;
}

.solution-card p {
    font-size: 13px;
    color: var(--text-sub);
    margin-bottom: 10px;
}

.solution-card ul {
    list-style: none;
    font-size: 12px;
}

.solution-card li + li {
    margin-top: 4px;
}

/* 合作咨询区 */
.contact {
    background: #020617;
    padding-bottom: 72px;
}

.contact-shell {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 40px;
    align-items: stretch;
    padding-top: 40px;
}

.contact-info {
    padding-right: 10px;
}

.contact-badge {
    display: inline-flex;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 11px;
    letter-spacing: 0.18em;
    border: 1px solid rgba(148, 163, 184, 0.5);
}

.contact-title {
    margin-top: 18px;
    font-size: 24px;
    font-weight: 600;
}

.contact-desc {
    margin-top: 12px;
    font-size: 14px;
    color: var(--text-sub);
}

.contact-highlights {
    margin-top: 18px;
    list-style: none;
    font-size: 13px;
}

.contact-highlights li + li {
    margin-top: 6px;
}

.contact-phone-large {
    margin-top: 22px;
    font-size: 15px;
}

.contact-panel {
    padding: 22px 20px 20px;
    border-radius: 22px;
    background: radial-gradient(circle at 100% 0, rgba(56, 189, 248, 0.35), transparent 55%),
        rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.7);
    box-shadow: var(--shadow-soft);
}

.contact-panel h3 {
    font-size: 16px;
    margin-bottom: 10px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    font-size: 13px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.contact-form label {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.contact-form input,
.contact-form textarea {
    padding: 7px 9px;
    border-radius: 10px;
    border: 1px solid rgba(148, 163, 184, 0.7);
    background: rgba(15, 23, 42, 0.9);
    color: #e5e7eb;
    font-size: 13px;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #60a5fa;
}

.form-tip {
    margin-top: 6px;
    font-size: 11px;
    color: var(--text-sub);
}

/* 页脚 */
.site-footer {
    border-top: 1px solid rgba(15, 23, 42, 0.95);
    background: #020617;
    padding: 18px 0 24px;
}

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

.footer-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-name {
    font-weight: 500;
}

.footer-desc {
    font-size: 11px;
    color: var(--text-sub);
}

.footer-meta {
    text-align: right;
    color: var(--text-sub);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 11px;
    color: var(--text-sub);
}

.footer-bottom a {
    color: #9ca3af;
}

/* 响应式 */
@media (max-width: 900px) {
    .main-nav {
        position: fixed;
        inset: 64px 0 auto;
        padding: 10px 24px;
        background: rgba(2, 8, 23, 0.98);
        border-bottom: 1px solid rgba(15, 23, 42, 0.9);
        transform: translateY(-120%);
        transition: transform 0.2s ease;
        justify-content: center;
    }

    .main-nav.open {
        transform: translateY(0);
    }

    .nav-toggle {
        display: flex;
    }

    .hero-shell,
    .contact-shell {
        grid-template-columns: minmax(0, 1fr);
    }

    .hero-shell {
        gap: 32px;
    }

    .core-grid,
    .solution-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .section-header-inline {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-main {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .footer-meta {
        text-align: left;
    }
}

@media (max-width: 640px) {
    .header-shell {
        gap: 8px;
    }

    .brand-name {
        font-size: 13px;
    }

    .hero-title {
        font-size: 26px;
    }

    .hero-highlight {
        font-size: 28px;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }
}