/* ============================================
   能基矩阵科技 | Energix Grid
   简约精致 · Minimalist & Refined
   ============================================ */

/* --- Reset & Variables --- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #0D1B2A;
    --color-primary-light: #1B3A4B;
    --color-accent: #C8953C;
    --color-accent-light: #E8D5B0;
    --color-accent-glow: rgba(200, 149, 60, 0.15);
    --color-bg: #F5F3EF;
    --color-bg-white: #FFFFFF;
    --color-text: #1A1A1A;
    --color-text-muted: #7A7A7A;
    --color-text-light: #B0A8A0;
    --color-border: #E8E3DC;
    --color-border-light: #F0EDE8;

    --font-serif: 'Noto Serif SC', 'Times New Roman', serif;
    --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Playfair Display', 'Noto Serif SC', serif;

    --max-width: 1200px;
    --header-height: 72px;

    --transition-smooth: cubic-bezier(0.22, 1, 0.36, 1);
    --transition-ease: cubic-bezier(0.4, 0, 0.2, 1);

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.08);
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-weight: 400;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    overflow-x: hidden;
}

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

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

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

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 36px;
    font-family: var(--font-sans);
    font-size: 15px;
    font-weight: 500;
    letter-spacing: 0.02em;
    border: 1px solid transparent;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.4s var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.btn--primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.btn--primary:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(13, 27, 42, 0.2);
}

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

.btn--outline:hover {
    border-color: #fff;
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-1px);
}

.btn--full {
    width: 100%;
}

/* --- Section --- */
.section {
    padding: 120px 0;
}

.section__header {
    text-align: center;
    margin-bottom: 72px;
}

.section__tag {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 400;
    font-style: italic;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 16px;
}

.section__title {
    font-family: var(--font-serif);
    font-size: 38px;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.04em;
    margin-bottom: 16px;
}

.section__subtitle {
    font-size: 16px;
    color: var(--color-text-muted);
    font-weight: 300;
    max-width: 480px;
    margin: 0 auto;
}

/* ============================================
   Header
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    transition: all 0.5s var(--transition-smooth);
}

.header--scrolled {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 var(--color-border);
}

.header--scrolled .header__logo-text,
.header--scrolled .header__nav-link {
    color: var(--color-text);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

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

.header__logo-img {
    height: 36px;
    width: auto;
}

.header__logo-text {
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 600;
    color: #fff;
    letter-spacing: 0.06em;
    transition: color 0.4s var(--transition-ease);
}

.header__nav {
    display: flex;
    align-items: center;
    gap: 36px;
}

.header__nav-link {
    font-size: 14px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.75);
    letter-spacing: 0.05em;
    transition: all 0.3s var(--transition-ease);
    position: relative;
    padding: 4px 0;
}

.header__nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--color-accent);
    transition: width 0.4s var(--transition-smooth);
}

.header__nav-link:hover {
    color: #fff;
}

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

.header__nav-link.active {
    color: #fff;
}

.header--scrolled .header__nav-link {
    color: var(--color-text-muted);
}

.header--scrolled .header__nav-link:hover,
.header--scrolled .header__nav-link.active {
    color: var(--color-text);
}

/* --- Mobile Menu Toggle --- */
.header__toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 28px;
    height: 28px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

.header__toggle span {
    display: block;
    width: 100%;
    height: 1.5px;
    background: #fff;
    transition: all 0.3s var(--transition-ease);
    transform-origin: center;
}

.header--scrolled .header__toggle span {
    background: var(--color-text);
}

.header__toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 5px);
}

.header__toggle.active span:nth-child(2) {
    opacity: 0;
}

.header__toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -5px);
}

/* ============================================
   Hero
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--color-primary);
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 20% 80%, rgba(200, 149, 60, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 80% 20%, rgba(27, 58, 75, 0.4) 0%, transparent 50%),
        radial-gradient(ellipse 50% 40% at 50% 50%, rgba(13, 27, 42, 0.6) 0%, transparent 70%);
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background-image:
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 40px,
            rgba(255, 255, 255, 0.01) 40px,
            rgba(255, 255, 255, 0.01) 41px
        ),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 40px,
            rgba(255, 255, 255, 0.01) 40px,
            rgba(255, 255, 255, 0.01) 41px
        );
    pointer-events: none;
}

.hero__inner {
    position: relative;
    z-index: 2;
    width: 100%;
    padding-top: var(--header-height);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero__content {
    max-width: 720px;
    animation: fadeInUp 1s var(--transition-smooth) forwards;
    opacity: 0;
}

.hero__badge {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 400;
    font-style: italic;
    letter-spacing: 0.25em;
    color: var(--color-accent);
    margin-bottom: 28px;
    padding: 6px 16px;
    border: 1px solid rgba(200, 149, 60, 0.25);
    border-radius: 2px;
}

.hero__title {
    margin-bottom: 24px;
}

.hero__title-line {
    display: block;
    font-family: var(--font-serif);
    font-size: clamp(42px, 7vw, 72px);
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.08em;
    line-height: 1.15;
}

.hero__slogan {
    font-family: var(--font-serif);
    font-size: clamp(18px, 2.5vw, 26px);
    font-weight: 400;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    letter-spacing: 0.06em;
    margin-bottom: 48px;
}



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

/* --- Scroll Indicator --- */
.hero__scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    animation: fadeInUp 1s 0.8s var(--transition-smooth) forwards;
    opacity: 0;
}

.hero__scroll-text {
    font-size: 11px;
    font-weight: 300;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.3);
}

.hero__scroll-line {
    width: 1px;
    height: 36px;
    background: linear-gradient(to bottom, rgba(200, 149, 60, 0.6), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

/* ============================================
   About
   ============================================ */
.about {
    background: var(--color-bg-white);
}

.about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.about__text {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.about__description {
    font-size: 15px;
    line-height: 1.9;
    color: var(--color-text-muted);
}

.about__description strong {
    color: var(--color-text);
    font-weight: 500;
}

.about__values {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-top: 12px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border-light);
}

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

.about__value-icon {
    color: var(--color-accent);
    font-size: 14px;
}

.about__value-text {
    font-size: 14px;
    color: var(--color-text);
    font-weight: 400;
}

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

.about__stat-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    border-radius: 4px;
    padding: 32px 24px;
    text-align: center;
    transition: all 0.4s var(--transition-smooth);
}

.about__stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent-light);
}

.about__stat-number {
    font-family: var(--font-display);
    font-size: 42px;
    font-weight: 600;
    color: var(--color-primary);
    line-height: 1;
}

.about__stat-suffix {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 400;
    color: var(--color-accent);
    margin-left: 2px;
}

.about__stat-label {
    display: block;
    margin-top: 8px;
    font-size: 13px;
    color: var(--color-text-muted);
    font-weight: 300;
}

/* ============================================
   Services
   ============================================ */
.services {
    background: var(--color-bg);
}

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

.service-card {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: 4px;
    padding: 40px 32px;
    transition: all 0.5s var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s var(--transition-smooth);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

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

.service-card__icon {
    color: var(--color-primary);
    margin-bottom: 24px;
    width: 48px;
    height: 48px;
    transition: color 0.4s var(--transition-ease);
}

.service-card:hover .service-card__icon {
    color: var(--color-accent);
}

.service-card__title {
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 12px;
    letter-spacing: 0.04em;
}

.service-card__desc {
    font-size: 14px;
    line-height: 1.8;
    color: var(--color-text-muted);
    font-weight: 300;
}

/* ============================================
   Contact
   ============================================ */
.contact {
    background: var(--color-bg-white);
}

.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
    align-items: start;
}

.contact__info {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.contact__item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact__item-icon {
    color: var(--color-accent);
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    margin-top: 2px;
}

.contact__item-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.contact__item-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text-light);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.contact__item-value {
    font-size: 15px;
    color: var(--color-text);
    font-weight: 400;
}

.contact__form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact__form-row {
    width: 100%;
}

.contact__form-input {
    width: 100%;
    padding: 14px 20px;
    font-family: var(--font-sans);
    font-size: 14px;
    color: var(--color-text);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    outline: none;
    transition: all 0.3s var(--transition-ease);
}

.contact__form-input::placeholder {
    color: var(--color-text-light);
    font-weight: 300;
}

.contact__form-input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-glow);
    background: var(--color-bg-white);
}

.contact__form-textarea {
    resize: vertical;
    min-height: 120px;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--color-primary);
    color: rgba(255, 255, 255, 0.6);
    padding: 48px 0;
}

.footer__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
    text-align: center;
}

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

.footer__logo {
    height: 32px;
    width: auto;
}

.footer__brand-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
}

.footer__brand-name {
    font-family: var(--font-serif);
    font-size: 16px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 0.06em;
}

.footer__brand-en {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.3);
    font-weight: 300;
    letter-spacing: 0.03em;
    white-space: nowrap;
}

.footer__beian {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.35);
}

.footer__beian a {
    color: rgba(255, 255, 255, 0.35);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer__beian a:hover {
    color: var(--color-accent);
}

.beian-icon {
    height: 1.2em;
    width: auto;
    vertical-align: middle;
    flex-shrink: 0;
    opacity: 0.6;
}

.footer__links {
    display: flex;
    gap: 36px;
}

.footer__link {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 0.05em;
    transition: color 0.3s var(--transition-ease);
}

.footer__link:hover {
    color: var(--color-accent);
}

.footer__copy {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.25);
    font-weight: 300;
    letter-spacing: 0.02em;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    width: 100%;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scrollPulse {
    0%, 100% {
        transform: scaleY(1);
        opacity: 0.6;
    }
    50% {
        transform: scaleY(0.6);
        opacity: 0.2;
    }
}

/* Reveal animation for scroll */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s var(--transition-smooth);
}

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

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
    .section {
        padding: 80px 0;
    }

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

    .about__grid {
        gap: 60px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 64px;
    }

    .header__nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--color-bg-white);
        flex-direction: column;
        justify-content: center;
        gap: 32px;
        padding: 40px;
        transition: right 0.5s var(--transition-smooth);
        box-shadow: -10px 0 40px rgba(0, 0, 0, 0.1);
    }

    .header__nav.open {
        right: 0;
    }

    .header__nav-link,
    .header--scrolled .header__nav-link {
        font-size: 18px;
        color: var(--color-text);
    }

    .header__toggle {
        display: flex;
    }

    .hero__content {
        max-width: 100%;
    }

    .hero__actions {
        flex-direction: column;
    }

    .hero__actions .btn {
        width: 100%;
    }

    .hero__scroll {
        display: none;
    }

    .section__title {
        font-size: 28px;
    }

    .section__header {
        margin-bottom: 48px;
    }

    .about__grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

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

    .services__grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .service-card {
        padding: 32px 24px;
    }

    .contact__grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .footer__links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 24px;
    }

    .footer__brand {
        flex-direction: column;
        align-items: center;
    }

    .footer__brand-text {
        align-items: center;
    }

    .footer__brand-en {
        white-space: normal;
        text-align: center;
        max-width: 280px;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 60px 0;
    }

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

    .about__stat-card {
        padding: 24px 16px;
    }

    .about__stat-number {
        font-size: 34px;
    }

    .container {
        padding: 0 16px;
    }
}