/* ============================================
   HONG KONG STRENGTH TRADING TECHNOLOGY CO., LIMITED
   Corporate Website Stylesheet
   Version: 1.0 — Full Header, Hero
   ============================================ */

/* CSS Variables */
:root {
    --primary: #ae1a1a;
    --black: #222222;
    --white: #ffffff;
    --gray-light: #cccccc;
    --gray-medium: #bbbbbb;
    --gray-dark: #666666;
    
    --font-heading: 'Moderna', serif;
    --font-body: 'MotoSans-Semibold', sans-serif;
    
    --container-max: 1400px;
    --header-height: 65px;
    --transition: 0.3s ease;
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Font Faces */
@font-face {
    font-family: 'Moderna';
    src: url('/MODERNA.TTF') format('truetype');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'MotoSans-Semibold';
    src: url('/MotoSans-Semibold.ttf') format('truetype');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-weight: 600;
    color: var(--black);
    background-color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition);
}

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

ul {
    list-style: none;
}

/* Container */
.stt-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 40px;
    width: 100%;
}

/* ============================================
   HEADER
   ============================================ */
.stt-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 900;
    border-bottom: 1px solid var(--gray-light);
    transition: all var(--transition);
    padding-top: 4px;
}

.stt-header.stt-header--scrolled {
    box-shadow: 0 2px 25px rgba(0, 0, 0, 0.08);
    height: 65px;
}

.stt-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: 30px;
}

.stt-logo-wrapper {
    flex-shrink: 0;
}

.stt-logo-link {
    display: flex;
    align-items: center;
}

.stt-logo {
    height: 55px;
    width: auto;
    transition: transform var(--transition);
}

.stt-logo:hover {
    transform: scale(1.03);
}

.stt-nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

.stt-nav-list {
    display: flex;
    gap: 35px;
    align-items: center;
}

.stt-nav-link {
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 15px;
    color: var(--black);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    position: relative;
    padding: 8px 0;
    transition: color var(--transition);
}

.stt-nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: width var(--transition);
}

.stt-nav-link:hover {
    color: var(--primary);
}

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

/* Language Switcher */
.stt-lang-switcher {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
    flex-shrink: 0;
}

.stt-lang-current {
    color: var(--primary);
}

.stt-lang-divider {
    color: var(--gray-medium);
}

.stt-lang-link {
    color: var(--black);
    transition: color var(--transition);
}

.stt-lang-link:hover {
    color: var(--primary);
}

/* Burger Menu */
.stt-burger {
    display: none;
    width: 45px;
    height: 45px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 7px;
    z-index: 1001;
    border-radius: 50%;
    transition: background-color var(--transition);
}

.stt-burger:hover {
    background-color: var(--gray-light);
}

.stt-burger-line {
    width: 28px;
    height: 2px;
    background-color: var(--black);
    transition: all var(--transition);
    transform-origin: center;
}

.stt-burger.stt-burger--active .stt-burger-line:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.stt-burger.stt-burger--active .stt-burger-line:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.stt-burger.stt-burger--active .stt-burger-line:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* ============================================
   HERO SECTION
   ============================================ */
.stt-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.stt-hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.stt-hero-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.stt-hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(34, 34, 34, 0.4) 0%, rgba(34, 34, 34, 0.2) 100%);
}

.stt-hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 120px 0 80px;
}

.stt-hero-top {
    display: flex;
    justify-content: flex-end;
    align-items: flex-start;
}

.stt-hero-heading {
    font-family: var(--font-heading);
    font-size: clamp(60px, 10vw, 140px);
    font-weight: normal;
    color: var(--white);
    line-height: 0.95;
    letter-spacing: -2px;
    text-transform: uppercase;
    text-align: right;
    max-width: 900px;
}

.stt-hero-bottom {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 60px;
}

.stt-hero-bottom-left {
    flex: 1;
    max-width: 500px;
}

.stt-hero-label {
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 13px;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 20px;
    display: block;
}

.stt-hero-subheading {
    font-family: var(--font-heading);
    font-size: clamp(32px, 5vw, 56px);
    font-weight: normal;
    color: var(--white);
    line-height: 1.1;
    letter-spacing: -1px;
    text-transform: uppercase;
}

.stt-hero-bottom-right {
    flex: 1;
    max-width: 500px;
}

.stt-hero-info-title {
    font-family: var(--font-heading);
    font-size: clamp(24px, 3vw, 36px);
    font-weight: normal;
    color: var(--primary);
    line-height: 1.2;
    letter-spacing: -0.5px;
    text-transform: uppercase;
    margin-bottom: 20px;
    background: #ffffffa8;
    padding: 15px 10px 0 15px;
}

.stt-hero-info-text {
    font-family: var(--font-body);
    font-size: 15px;
    line-height: 1.7;
    color: var(--white);
    font-weight: 600;
}

/* Scroll Indicator */
.stt-hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 40px;
    z-index: 3;
}

.stt-scroll-circle {
    width: 70px;
    height: 70px;
    background-color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 24px;
    transition: all var(--transition);
    cursor: pointer;
}

.stt-scroll-circle:hover {
    transform: scale(1.1);
    background-color: var(--black);
}

/* ============================================
   TABLET ADAPTATION (768px)
   ============================================ */
@media (max-width: 768px) {
    :root {
        --header-height: 70px;
    }
    
    .stt-container {
        padding: 0 25px;
    }
    
    .stt-burger {
        display: flex;
    }
    
    .stt-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background-color: var(--white);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: right var(--transition-slow);
        z-index: 1000;
    }
    
    .stt-nav.stt-nav--active {
        right: 0;
    }
    
    .stt-nav-list {
        flex-direction: column;
        gap: 35px;
    }
    
    .stt-nav-link {
        font-size: 20px;
        letter-spacing: 2px;
    }
    
    .stt-lang-switcher {
        display: none;
    }
    
    .stt-hero-content {
        padding: 100px 0 60px;
    }
    
    .stt-hero-heading {
        font-size: clamp(40px, 12vw, 80px);
        text-align: left;
    }
    
    .stt-hero-bottom {
        flex-direction: column;
        gap: 40px;
        align-items: flex-start;
    }
    
    .stt-hero-bottom-left,
    .stt-hero-bottom-right {
        max-width: 100%;
    }
    
    .stt-hero-subheading {
        font-size: clamp(24px, 7vw, 40px);
    }
    
    .stt-hero-info-title {
        font-size: clamp(20px, 5vw, 28px);
    }
    
    .stt-hero-info-text {
        font-size: 14px;
    }
    
    .stt-hero-scroll {
        bottom: 30px;
        left: 25px;
    }
    
    .stt-scroll-circle {
        width: 60px;
        height: 60px;
        font-size: 20px;
    }
}

/* ============================================
   MOBILE ADAPTATION (320px)
   ============================================ */
@media (max-width: 320px) {
    .stt-container {
        padding: 0 15px;
    }
    
    .stt-logo {
        height: 42px;
    }
    
    .stt-hero-heading {
        font-size: 36px;
        letter-spacing: -1px;
    }
    
    .stt-hero-subheading {
        font-size: 22px;
    }
    
    .stt-hero-info-title {
        font-size: 18px;
    }
    
    .stt-hero-info-text {
        font-size: 13px;
    }
    
    .stt-hero-label {
        font-size: 11px;
        letter-spacing: 2px;
    }
    
    .stt-scroll-circle {
        width: 50px;
        height: 50px;
        font-size: 18px;
    }
}

/* ============================================
   DESKTOP ADAPTATION (1024px)
   ============================================ */
@media (max-width: 1024px) {
    .stt-nav-list {
        gap: 25px;
    }
    
    .stt-hero-heading {
        font-size: clamp(50px, 8vw, 100px);
    }
    
    .stt-hero-bottom {
        gap: 40px;
    }
}





/* ============================================
   ABOUT SECTION (Reference: Industrial)
   ============================================ */
.stt-about {
    padding: 140px 0;
    background-color: var(--white);
    position: relative;
    overflow: hidden;
}

.stt-about-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.stt-about-images {
    position: relative;
    height: 600px;
}

.stt-about-img-main {
    position: absolute;
    top: 0;
    left: 0;
    width: 75%;
    height: 80%;
    border-radius: 12px;
    overflow: hidden;
    z-index: 1;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.stt-about-img-secondary {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 55%;
    height: 55%;
    border-radius: 12px;
    overflow: hidden;
    z-index: 2;
    border: 8px solid var(--white);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.2);
}

.stt-about-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.stt-about-img-main:hover .stt-about-img,
.stt-about-img-secondary:hover .stt-about-img {
    transform: scale(1.05);
}

.stt-about-content {
    padding: 20px 0;
}

.stt-about-label {
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 12px;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 3px;
    display: block;
    margin-bottom: 20px;
}

.stt-about-heading {
    font-family: var(--font-heading);
    font-size: clamp(32px, 4vw, 48px);
    font-weight: normal;
    color: var(--black);
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 35px;
    text-transform: uppercase;
}

.stt-accent {
    color: var(--primary);
}

.stt-about-text {
    font-family: var(--font-body);
    font-size: 15px;
    line-height: 1.7;
    color: var(--gray-dark);
    margin-bottom: 20px;
    font-weight: 600;
}

.stt-about-list {
    margin-top: 35px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.stt-about-list-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.stt-list-marker {
    width: 10px;
    height: 10px;
    background-color: var(--primary);
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 7px;
}

.stt-list-text {
    font-family: var(--font-body);
    font-size: 15px;
    color: var(--black);
    font-weight: 600;
    line-height: 1.5;
}

/* ============================================
   SOURCING MATRIX SECTION (Reference: Industry 4 cards)
   ============================================ */
.stt-sourcing {
    padding: 140px 0;
    background-color: var(--gray-light);
    position: relative;
}

.stt-sourcing-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 80px;
}

.stt-section-label {
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 12px;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 3px;
    display: block;
    margin-bottom: 20px;
}

.stt-section-heading {
    font-family: var(--font-heading);
    font-size: clamp(32px, 4vw, 52px);
    font-weight: normal;
    color: var(--black);
    line-height: 1.1;
    letter-spacing: -1px;
    margin-bottom: 20px;
    text-transform: uppercase;
}

.stt-section-subtitle {
    font-family: var(--font-body);
    font-size: 15px;
    color: var(--gray-dark);
    font-weight: 600;
    line-height: 1.6;
}

.stt-sourcing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.stt-sourcing-card {
    background-color: var(--white);
    border-radius: 16px;
    padding: 40px 30px;
    position: relative;
    transition: transform var(--transition), box-shadow var(--transition);
    display: flex;
    flex-direction: column;
    min-height: 320px;
}

.stt-sourcing-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
}

.stt-card-icon {
    width: 50px;
    height: 50px;
    background-color: var(--primary);
    color: var(--white);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 25px;
}

.stt-card-title {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: normal;
    color: var(--black);
    margin-bottom: 15px;
    letter-spacing: -0.3px;
    text-transform: uppercase;
    line-height: 1.2;
}

.stt-card-text {
    font-family: var(--font-body);
    font-size: 14px;
    line-height: 1.6;
    color: var(--gray-dark);
    font-weight: 600;
    flex-grow: 1;
}

.stt-card-arrow {
    position: absolute;
    bottom: 25px;
    right: 25px;
    width: 36px;
    height: 36px;
    background-color: var(--gray-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--black);
    font-size: 14px;
    transition: all var(--transition);
}

.stt-sourcing-card:hover .stt-card-arrow {
    background-color: var(--primary);
    color: var(--white);
    transform: rotate(45deg);
}

/* ============================================
   ABOUT — MOBILE ADAPTATION
   ============================================ */
@media (max-width: 768px) {
    .stt-about {
        padding: 80px 0;
    }
    
    .stt-about-layout {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .stt-about-images {
        height: 450px;
        order: -1;
    }
    
    .stt-about-img-main {
        width: 80%;
        height: 75%;
    }
    
    .stt-about-img-secondary {
        width: 60%;
        height: 50%;
    }
    
    .stt-about-heading {
        font-size: clamp(26px, 6vw, 36px);
    }
    
    .stt-about-text {
        font-size: 14px;
    }
}

@media (max-width: 320px) {
    .stt-about {
        padding: 60px 0;
    }
    
    .stt-about-images {
        height: 350px;
    }
    
    .stt-about-img-main {
        width: 85%;
        height: 70%;
    }
    
    .stt-about-img-secondary {
        width: 65%;
        height: 45%;
        border-width: 5px;
    }
    
    .stt-about-heading {
        font-size: 24px;
        letter-spacing: -0.5px;
    }
    
    .stt-about-text {
        font-size: 13px;
    }
    
    .stt-list-text {
        font-size: 13px;
    }
}

@media (max-width: 1024px) {
    .stt-about-layout {
        gap: 60px;
    }
    
    .stt-about-images {
        height: 500px;
    }
}

/* ============================================
   SOURCING — MOBILE ADAPTATION
   ============================================ */
@media (max-width: 768px) {
    .stt-sourcing {
        padding: 80px 0;
    }
    
    .stt-sourcing-header {
        margin-bottom: 50px;
    }
    
    .stt-sourcing-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .stt-sourcing-card {
        padding: 30px 25px;
        min-height: 280px;
    }
    
    .stt-card-title {
        font-size: 18px;
    }
    
    .stt-card-text {
        font-size: 13px;
    }
}

@media (max-width: 320px) {
    .stt-sourcing {
        padding: 60px 0;
    }
    
    .stt-sourcing-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .stt-sourcing-card {
        padding: 25px 20px;
        min-height: 260px;
    }
    
    .stt-section-heading {
        font-size: 26px;
    }
    
    .stt-section-subtitle {
        font-size: 14px;
    }
    
    .stt-card-icon {
        width: 45px;
        height: 45px;
        font-size: 20px;
    }
    
    .stt-card-title {
        font-size: 17px;
    }
}

@media (max-width: 1024px) {
    .stt-sourcing-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
}






/* ============================================
   QUALITY ASSURANCE SECTION (Reference: Your Benefits)
   ============================================ */
.stt-quality {
    padding: 140px 0;
    background-color: var(--white);
    position: relative;
    overflow: hidden;
}

/* Decorative dots */
.stt-quality-decorative,
.stt-trade-decorative {
    position: absolute;
    width: 8px;
    height: 8px;
    background-color: var(--primary);
    border-radius: 50%;
}

.stt-decorative-tl {
    top: 40px;
    left: 40px;
}

.stt-decorative-tr {
    top: 40px;
    right: 40px;
}

.stt-decorative-bl {
    bottom: 40px;
    left: 40px;
}

.stt-decorative-br {
    bottom: 40px;
    right: 40px;
}

.stt-quality-header {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-bottom: 80px;
    align-items: start;
}

.stt-quality-heading {
    font-family: var(--font-heading);
    font-size: clamp(36px, 4.5vw, 56px);
    font-weight: normal;
    color: var(--black);
    line-height: 1.05;
    letter-spacing: -1px;
    text-transform: uppercase;
    margin-top: 20px;
}

.stt-quality-intro {
    font-family: var(--font-body);
    font-size: 15px;
    line-height: 1.7;
    color: var(--gray-dark);
    font-weight: 600;
    padding-top: 10px;
}

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

.stt-quality-card {
    background-color: var(--white);
    border: 2px solid var(--gray-light);
    border-radius: 20px;
    padding: 40px 30px;
    position: relative;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.stt-quality-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(174, 26, 26, 0.1);
}

.stt-quality-icon {
    width: 60px;
    height: 60px;
    background-color: var(--primary);
    color: var(--white);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    margin-bottom: 25px;
}

.stt-quality-card-title {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: normal;
    color: var(--black);
    margin-bottom: 15px;
    letter-spacing: -0.3px;
    text-transform: uppercase;
    line-height: 1.2;
}

.stt-quality-card-text {
    font-family: var(--font-body);
    font-size: 14px;
    line-height: 1.6;
    color: var(--gray-dark);
    font-weight: 600;
    flex-grow: 1;
}

/* ============================================
   GLOBAL TRADE CORRIDORS SECTION (Reference: Pro Improver)
   ============================================ */
.stt-trade {
    padding: 140px 0 0;
    background-color: var(--gray-light);
    position: relative;
    overflow: hidden;
}

.stt-trade-header {
    text-align: center;
    max-width: 900px;
    margin: 0 auto 80px;
    padding: 0 40px;
}

.stt-trade-heading {
    font-family: var(--font-heading);
    font-size: clamp(36px, 5vw, 64px);
    font-weight: normal;
    color: var(--black);
    line-height: 1.05;
    letter-spacing: -1.5px;
    margin: 20px 0 25px;
    text-transform: uppercase;
}

.stt-trade-subtitle {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    color: var(--gray-dark);
    font-weight: 600;
    max-width: 700px;
    margin: 0 auto;
}

.stt-trade-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: start;
    padding: 0 40px;
}

.stt-trade-info {
    display: flex;
    flex-direction: column;
    gap: 40px;
    padding: 60px 0;
}

.stt-trade-block {
    padding-bottom: 40px;
    border-bottom: 1px solid var(--gray-medium);
}

.stt-trade-block:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.stt-trade-block-title {
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: normal;
    color: var(--black);
    margin-bottom: 15px;
    letter-spacing: -0.5px;
    text-transform: uppercase;
}

.stt-trade-block-text {
    font-family: var(--font-body);
    font-size: 15px;
    line-height: 1.7;
    color: var(--gray-dark);
    font-weight: 600;
}

.stt-trade-image {
    position: relative;
    border-radius: 20px 20px 0 0;
    overflow: hidden;
    height: 600px;
}

.stt-trade-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.stt-trade-image:hover .stt-trade-img {
    transform: scale(1.03);
}

/* ============================================
   QUALITY — MOBILE ADAPTATION
   ============================================ */
@media (max-width: 768px) {
    .stt-quality {
        padding: 80px 0;
    }
    
    .stt-quality-header {
        grid-template-columns: 1fr;
        gap: 30px;
        margin-bottom: 50px;
    }
    
    .stt-quality-heading {
        font-size: clamp(28px, 7vw, 40px);
    }
    
    .stt-quality-intro {
        font-size: 14px;
    }
    
    .stt-quality-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .stt-quality-card {
        padding: 30px 25px;
    }
    
    .stt-quality-icon {
        width: 50px;
        height: 50px;
        font-size: 22px;
    }
    
    .stt-quality-card-title {
        font-size: 18px;
    }
    
    .stt-quality-card-text {
        font-size: 13px;
    }
    
    .stt-decorative-tl,
    .stt-decorative-tr,
    .stt-decorative-bl,
    .stt-decorative-br {
        width: 6px;
        height: 6px;
    }
    
    .stt-decorative-tl,
    .stt-decorative-bl {
        left: 20px;
    }
    
    .stt-decorative-tr,
    .stt-decorative-br {
        right: 20px;
    }
    
    .stt-decorative-tl,
    .stt-decorative-tr {
        top: 25px;
    }
    
    .stt-decorative-bl,
    .stt-decorative-br {
        bottom: 25px;
    }
}

@media (max-width: 320px) {
    .stt-quality {
        padding: 60px 0;
    }
    
    .stt-quality-heading {
        font-size: 26px;
    }
    
    .stt-quality-intro {
        font-size: 13px;
    }
    
    .stt-quality-card {
        padding: 25px 20px;
    }
    
    .stt-quality-icon {
        width: 45px;
        height: 45px;
        font-size: 20px;
        margin-bottom: 20px;
    }
    
    .stt-quality-card-title {
        font-size: 17px;
    }
    
    .stt-quality-card-text {
        font-size: 13px;
    }
}

@media (max-width: 1024px) {
    .stt-quality-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
}

/* ============================================
   TRADE — MOBILE ADAPTATION
   ============================================ */
@media (max-width: 768px) {
    .stt-trade {
        padding: 80px 0 0;
    }
    
    .stt-trade-header {
        margin-bottom: 50px;
        padding: 0 25px;
    }
    
    .stt-trade-heading {
        font-size: clamp(28px, 7vw, 42px);
        letter-spacing: -1px;
    }
    
    .stt-trade-subtitle {
        font-size: 14px;
    }
    
    .stt-trade-content {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 0 25px;
    }
    
    .stt-trade-info {
        padding: 40px 0;
        gap: 30px;
    }
    
    .stt-trade-block {
        padding-bottom: 30px;
    }
    
    .stt-trade-block-title {
        font-size: 20px;
    }
    
    .stt-trade-block-text {
        font-size: 14px;
    }
    
    .stt-trade-image {
        height: 400px;
        border-radius: 16px 16px 0 0;
    }
}

@media (max-width: 320px) {
    .stt-trade {
        padding: 60px 0 0;
    }
    
    .stt-trade-header {
        padding: 0 15px;
    }
    
    .stt-trade-heading {
        font-size: 26px;
        letter-spacing: -0.5px;
    }
    
    .stt-trade-subtitle {
        font-size: 13px;
    }
    
    .stt-trade-content {
        padding: 0 15px;
    }
    
    .stt-trade-block-title {
        font-size: 18px;
    }
    
    .stt-trade-block-text {
        font-size: 13px;
    }
    
    .stt-trade-image {
        height: 300px;
    }
}

@media (max-width: 1024px) {
    .stt-trade-content {
        gap: 40px;
    }
    
    .stt-trade-image {
        height: 500px;
    }
}



/* ============================================
   CONTACT SECTION
   ============================================ */
.stt-contact {
    padding: 140px 0;
    background-color: var(--white);
    position: relative;
}

.stt-contact-header {
    max-width: 800px;
    margin-bottom: 80px;
}

.stt-contact-heading {
    font-family: var(--font-heading);
    font-size: clamp(36px, 4.5vw, 56px);
    font-weight: normal;
    color: var(--black);
    line-height: 1.1;
    letter-spacing: -1px;
    margin: 20px 0 25px;
    text-transform: uppercase;
}

.stt-contact-subtitle {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    color: var(--gray-dark);
    font-weight: 600;
}

.stt-contact-layout {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 80px;
    align-items: start;
}

/* Inline Notification */
.stt-form-notification {
    display: none;
    align-items: center;
    gap: 15px;
    padding: 20px 25px;
    margin-bottom: 40px;
    border-top: 3px solid;
    font-family: 'Roboto', sans-serif !important;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.5px;
    background-color: transparent;
}

.stt-form-notification.stt-notification--success {
    border-top-color: var(--black);
    color: var(--black);
}

.stt-form-notification.stt-notification--error {
    border-top-color: var(--primary);
    color: var(--primary);
}

.stt-notification-icon {
    font-size: 18px;
    font-weight: 700;
}

.stt-form-notification.stt-notification--success .stt-notification-icon::before {
    content: '✓';
}

.stt-form-notification.stt-notification--error .stt-notification-icon::before {
    content: '✕';
}

/* Form */
.stt-contact-form {
    display: flex;
    flex-direction: column;
    gap: 35px;
}

.stt-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.stt-field-numbered {
    position: relative;
    padding-left: 50px;
}

.stt-field-number {
    position: absolute;
    left: 0;
    top: 28px;
    font-size: 14px;
    color: var(--primary);
    font-weight: normal;
    letter-spacing: 1px;
}

.stt-field-label {
    display: block;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 12px;
    color: var(--black);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 12px;
}

.stt-form-input,
.stt-form-select,
.stt-form-textarea {
    width: 100%;
    font-family: var(--font-body);
    font-size: 16px;
    color: var(--black);
    background: transparent;
    border: none;
    border-bottom: 2px solid var(--gray-light);
    padding: 12px 0;
    transition: border-color var(--transition);
    outline: none;
    font-weight: 600;
}

.stt-form-input:focus,
.stt-form-select:focus,
.stt-form-textarea:focus {
    border-bottom-color: var(--primary);
}

.stt-form-input::placeholder,
.stt-form-textarea::placeholder {
    color: var(--gray-medium);
}

.stt-form-input.stt-input-error,
.stt-form-select.stt-input-error,
.stt-form-textarea.stt-input-error {
    border-bottom-color: var(--primary);
}

.stt-form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23222' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right center;
    padding-right: 30px;
}

.stt-form-textarea {
    resize: vertical;
    min-height: 60px;
    line-height: 1.5;
}

.stt-field-error {
    display: block;
    font-family: var(--font-body);
    font-size: 12px;
    color: var(--primary);
    margin-top: 8px;
    font-weight: 600;
    min-height: 16px;
}

/* CAPTCHA */
.stt-captcha-block {
    display: flex;
    align-items: flex-end;
    gap: 30px;
    padding: 30px;
    background-color: var(--gray-light);
    border-radius: 4px;
}

.stt-captcha-display {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 15px 25px;
    background-color: var(--white);
    border: 2px dashed var(--gray-medium);
    border-radius: 4px;
    min-width: 180px;
    justify-content: center;
    user-select: none;
}

.stt-captcha-char {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: normal;
    display: inline-block;
    transition: transform 0.3s ease;
}

.stt-captcha-refresh {
    width: 50px;
    height: 50px;
    background-color: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
    transition: all var(--transition);
}

.stt-captcha-refresh:hover {
    background-color: var(--black);
    transform: rotate(180deg);
}

.stt-captcha-input-field {
    flex: 1;
}

/* Consent */
.stt-consent-block {
    padding-top: 10px;
}

.stt-custom-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    cursor: pointer;
    position: relative;
}

.stt-checkbox-input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.stt-checkbox-mark {
    width: 22px;
    height: 22px;
    border: 2px solid var(--gray-light);
    border-radius: 2px;
    flex-shrink: 0;
    position: relative;
    transition: all var(--transition);
    margin-top: 2px;
}

.stt-checkbox-input:checked + .stt-checkbox-mark {
    background-color: var(--primary);
    border-color: var(--primary);
}

.stt-checkbox-input:checked + .stt-checkbox-mark::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid var(--white);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.stt-checkbox-text {
    font-family: var(--font-body);
    font-size: 14px;
    color: var(--black);
    line-height: 1.5;
    font-weight: 600;
}

.stt-consent-error {
    margin-left: 37px;
    margin-top: 10px;
}

/* Submit Button */
.stt-submit-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 22px 35px;
    background-color: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all var(--transition);
    margin-top: 20px;
}

.stt-submit-btn:hover {
    background-color: var(--primary);
    color: var(--white);
}

.stt-submit-icon {
    transition: transform var(--transition);
}

.stt-submit-btn:hover .stt-submit-icon {
    transform: translateX(8px);
}

/* Contact Info Column */
.stt-contact-info-column {
    display: flex;
    flex-direction: column;
    gap: 50px;
    padding-top: 20px;
    position: sticky;
    top: 120px;
}

.stt-info-block {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--gray-light);
}

.stt-info-label {
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 11px;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.stt-info-email {
    font-size: 22px;
    font-weight: normal;
    color: var(--black);
    text-decoration: none;
    transition: color var(--transition);
    line-height: 1.3;
}

.stt-info-email:hover {
    color: var(--primary);
}

.stt-info-address {
    font-family: var(--font-body);
    font-size: 16px;
    color: var(--black);
    line-height: 1.5;
    font-style: normal;
    font-weight: 600;
}

.stt-info-reg {
    font-family: var(--font-body);
    font-size: 16px;
    color: var(--black);
    font-weight: 600;
    letter-spacing: 1px;
}

.stt-info-decorative {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 15px;
    margin-top: 20px;
}

.stt-decorative-text {
    font-family: var(--font-heading);
    font-size: 13px;
    color: var(--gray-medium);
    letter-spacing: 3px;
    text-transform: uppercase;
}

.stt-decorative-line {
    width: 60px;
    height: 2px;
    background-color: var(--primary);
}

/* ============================================
   FOOTER
   ============================================ */
.stt-footer {
    background-color: var(--white);
    color: var(--black);
    padding: 100px 0 50px;
    border-top: 1px solid var(--gray-light);
}

.stt-footer-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.stt-footer-brand {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.stt-footer-logo {
    height: auto;
    width: 100%;
    max-width: 250px;
}

.stt-footer-display-text {
    font-family: var(--font-heading);
    font-size: clamp(48px, 6vw, 68px);
    font-weight: normal;
    color: var(--black);
    line-height: 0.95;
    letter-spacing: 0;
    margin: 0;
    text-transform: uppercase;
}

.stt-footer-details {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    gap: 30px;
    padding-bottom: 10px;
}

.stt-footer-detail-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-bottom: 25px;
    border-bottom: 1px solid var(--gray-light);
}

.stt-footer-detail-row:last-child {
    border-bottom: none;
}

.stt-footer-detail-label {
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 11px;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.stt-footer-detail-value {
    font-family: var(--font-body);
    font-size: 15px;
    color: var(--black);
    line-height: 1.5;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stt-footer-link {
    text-decoration: none;
    transition: color var(--transition);
}

.stt-footer-link:hover {
    color: var(--primary);
}

.stt-footer-divider {
    width: 100%;
    height: 1px;
    background-color: var(--black);
    margin-bottom: 30px;
}

.stt-footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 40px;
}

.stt-footer-copyright {
    font-family: var(--font-body);
    font-size: 13px;
    color: var(--black);
    font-weight: 600;
    flex-shrink: 0;
}

.stt-footer-legal {
    font-family: 'Courier New', monospace;
    font-size: 10px;
    color: var(--gray-medium);
    line-height: 1.6;
    max-width: 600px;
    text-align: right;
}

/* ============================================
   CONTACT — MOBILE ADAPTATION
   ============================================ */
@media (max-width: 768px) {
    .stt-contact {
        padding: 80px 0;
    }
    
    .stt-contact-header {
        margin-bottom: 50px;
    }
    
    .stt-contact-heading {
        font-size: clamp(28px, 7vw, 40px);
    }
    
    .stt-contact-subtitle {
        font-size: 14px;
    }
    
    .stt-contact-layout {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .stt-form-row {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .stt-field-numbered {
        padding-left: 40px;
    }
    
    .stt-field-number {
        font-size: 12px;
        top: 26px;
    }
    
    .stt-captcha-block {
        flex-direction: column;
        align-items: stretch;
        gap: 20px;
        padding: 25px 20px;
    }
    
    .stt-captcha-display {
        min-width: auto;
        justify-content: center;
    }
    
    .stt-captcha-refresh {
        align-self: flex-end;
    }
    
    .stt-contact-info-column {
        position: static;
        gap: 35px;
    }
    
    .stt-info-email {
        font-size: 18px;
    }
    
    .stt-footer-main {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .stt-footer-display-text {
        font-size: clamp(36px, 10vw, 56px);
    }
    
    .stt-footer-bottom {
        flex-direction: column;
        gap: 20px;
    }
    
    .stt-footer-legal {
        text-align: left;
        font-size: 9px;
    }
}

@media (max-width: 320px) {
    .stt-contact {
        padding: 60px 0;
    }
    
    .stt-contact-heading {
        font-size: 26px;
    }
    
    .stt-contact-subtitle {
        font-size: 13px;
    }
    
    .stt-field-numbered {
        padding-left: 35px;
    }
    
    .stt-field-number {
        font-size: 11px;
    }
    
    .stt-field-label {
        font-size: 11px;
    }
    
    .stt-form-input,
    .stt-form-select,
    .stt-form-textarea {
        font-size: 15px;
    }
    
    .stt-captcha-char {
        font-size: 22px;
    }
    
    .stt-submit-btn {
        padding: 18px 25px;
        font-size: 13px;
    }
    
    .stt-footer {
        padding: 60px 0 40px;
    }
    
    .stt-footer-display-text {
        font-size: 32px;
        letter-spacing: -1px;
    }
    
    .stt-footer-detail-value {
        font-size: 13px;
    }
}

@media (max-width: 1024px) {
    .stt-contact-layout {
        gap: 50px;
    }
    
    .stt-form-row {
        gap: 30px;
    }
}



@media (max-width: 500px) {
.stt-logo {
    height: 45px;
}
.stt-header {
    height: 55px !important;
    max-height: 55px !important;
}
.stt-container {
    padding: 0 18px;
}
.stt-sourcing-grid {
    grid-template-columns: repeat(1, 1fr);
    gap: 25px;
}
.stt-card-arrow {
    display: none;
}
.stt-quality-grid {
    grid-template-columns: repeat(1, 1fr);
    gap: 25px;
}




}