/* Basic Resets & Variables */
:root {
    --primary-color-start: #D842F5; /* Deep purple */
    --primary-color-end: #FF69B4;   /* Hot pink */
    --secondary-color: #2c2c2c; /* Darker for better contrast on lighter backgrounds */
    --text-color: #3f3f3f;
    --light-grey: #f8f8fa; /* Even lighter, almost white */
    --medium-grey: #e0e0e5; /* Subtle grey for borders/backgrounds */
    --dark-grey: #6a6a6a;
    --white: #fff;
    --shadow-light: rgba(0, 0, 0, 0.06);
    --shadow-medium: rgba(0, 0, 0, 0.12);
    --border-radius: 18px; /* Slightly more rounded for iOS feel */
    --transition-speed: 0.3s ease;

    /* Pricing section specific colors for a darker theme */
    --pricing-bg: #1c1c1e; /* Dark background */
    --pricing-card-bg: #2a2a2c; /* Slightly lighter card background */
    --pricing-text-light: #e0e0e0;
    --pricing-text-dim: #a0a0a0;
}

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

body {
    /* Updated font stack for a more modern, clean, and premium feel */
    font-family: "SF Pro Text", "SF Pro Icons", "PingFang SC", "Helvetica Neue", "Helvetica", "Arial", sans-serif;
    line-height: 1.7; /* Slightly increased line height for readability */
    color: var(--text-color);
    background-color: var(--light-grey);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased; /* Smoother fonts for macOS/iOS */
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1280px; /* Slightly wider container */
    margin: 0 auto;
    padding: 0 25px; /* More padding */
}

/* Typography */
h1, h2, h3, h4 {
    color: var(--secondary-color);
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: -0.02em; /* Subtle tightening for modern look */
}

h1 {
    font-size: 3.8em; /* Slightly larger */
    text-align: center;
    line-height: 1.15;
}

h2 {
    font-size: 2.8em; /* Slightly larger */
    text-align: center;
    margin-bottom: 50px; /* More space */
}

h3 {
    font-size: 1.9em;
    margin-bottom: 18px;
}

h4 {
    font-size: 1.7em;
}

p {
    margin-bottom: 12px;
    font-size: 1.05em; /* Slightly larger base font */
}

strong {
    font-weight: 700;
    color: var(--primary-color-start); /* Emphasis with start color of gradient */
}

/* Buttons */
.cta-button {
    /* iOS tech pink-purple gradient */
    background: linear-gradient(45deg, var(--primary-color-start), var(--primary-color-end));
    color: var(--white);
    padding: 16px 32px; /* Slightly larger button */
    border: none;
    border-radius: 50px;
    font-size: 1.15em; /* Slightly larger font */
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed);
    /* Softer, more diffused shadow */
    box-shadow: 0 10px 25px rgba(216, 66, 245, 0.25);
    text-decoration: none;
    display: inline-block;
    letter-spacing: 0.02em;
}

.cta-button:hover {
    transform: translateY(-4px); /* More pronounced lift */
    box-shadow: 0 15px 35px rgba(216, 66, 245, 0.35);
}

/* Header */
header {
    background-color: var(--white);
    padding: 18px 0; /* Slightly more padding */
    box-shadow: 0 4px 15px var(--shadow-light); /* Softer shadow */
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo-title {
    display: flex;
    align-items: center;
    gap: 15px; /* Space between logo and text */
}

.logo-title img {
    height: 45px; /* Slightly larger logo */
    vertical-align: middle;
}

.site-title {
    font-size: 1.4em; /* Larger title font */
    font-weight: 600;
    color: var(--secondary-color);
    white-space: nowrap; /* Keep text on one line */
}

nav ul {
    list-style: none;
    display: flex;
}

nav ul li {
    margin-left: 35px; /* More spacing */
}

nav ul li a {
    text-decoration: none;
    color: var(--dark-grey);
    font-weight: 500;
    font-size: 1.08em;
    transition: color var(--transition-speed);
    padding: 5px 0; /* For better hover target */
}

nav ul li a:hover {
    color: var(--primary-color-end); /* Hover with end color of gradient */
}

/* Hero Banner */
.hero-banner {
    position: relative;
    height: 600px; /* Slightly taller banner */
    background: linear-gradient(135deg, #F0E6FF, #E6F7FF); /* Very soft, almost iridescent background */
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    overflow: hidden;
    padding-top: 80px;
    border-bottom-left-radius: 60px; /* More pronounced curvature */
    border-bottom-right-radius: 60px;
}

.hero-content {
    position: relative;
    z-index: 3; /* Ensure text is above image AND overlay */
    max-width: 900px; /* Limit text width */
    padding: 0 20px;
}

.hero-banner h1 {
    color: var(--white); /* White text for banner title */
    font-size: 3.2em; /* Adjusted font size for wider full display */
    margin-bottom: 25px;
    text-shadow: 0 5px 15px rgba(0, 0, 0, 0.4); /* Stronger shadow for white text */
    white-space: nowrap; /* Keep title on one line */
    text-overflow: ellipsis; /* Add ellipsis if it overflows, though nowrap should prevent this */
    overflow: hidden;
    max-width: 100%; /* Allow full width to prevent premature truncation */
    margin-left: auto;
    margin-right: auto;
}

.hero-banner p {
    font-size: 1.4em; /* Larger tagline */
    color: var(--white); /* White text for tagline */
    margin-bottom: 40px;
    text-shadow: 0 3px 8px rgba(0, 0, 0, 0.3);
}

.hero-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%; /* Fill banner horizontally */
    height: 100%; /* Fill banner vertically */
    object-fit: cover; /* Cover the area, cropping as needed */
    z-index: 1; /* Behind content */
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* Stronger darken: Increased opacity and used a gradient for better blending */
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.4)); /* Stronger gradient for darken */
    mix-blend-mode: multiply; /* This creates the "正片叠底" effect */
    z-index: 2; /* Between image and text content */
}


/* Features Section */
.features {
    padding: 90px 0; /* More padding */
    background-color: var(--white);
    border-radius: var(--border-radius);
    margin: 60px auto; /* More margin */
    box-shadow: 0 15px 40px var(--shadow-light); /* Stronger but softer shadow */
}

.feature-grid {
    /* Four items in one row */
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* Explicitly 4 columns */
    gap: 35px; /* More gap */
    padding: 0 25px;
}

.feature-item {
    background-color: var(--light-grey);
    padding: 35px; /* More padding */
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: 0 8px 25px var(--shadow-light); /* Refined shadow */
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.feature-item:hover {
    transform: translateY(-7px); /* More pronounced lift */
    box-shadow: 0 12px 30px var(--shadow-medium);
}

.feature-item i {
    font-size: 3.5em; /* Larger icons */
    background: -webkit-linear-gradient(45deg, var(--primary-color-start), var(--primary-color-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent; /* Gradient text for icons */
    margin-bottom: 25px;
}

.feature-item h3 {
    font-size: 1.6em;
    margin-bottom: 18px;
    color: var(--secondary-color);
}

.feature-item p {
    font-size: 0.98em;
    color: var(--dark-grey);
}

/* Gallery Section */
.gallery {
    padding: 90px 0;
    background-color: var(--light-grey);
}

.gallery-wrapper {
    overflow: hidden;
    margin-top: 50px;
    position: relative;
    padding: 25px 0; /* More padding for shadow and flow */
    /* Subtle inner shadow effect at edges for depth */
    box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.05);
    border-radius: var(--border-radius);
}

.gallery-row {
    display: flex;
    white-space: nowrap;
    animation: scroll-left 45s linear infinite; /* Adjusted speed */
    padding: 15px 0; /* Spacing between rows */
}

.gallery-row-bottom {
    animation: scroll-right 45s linear infinite; /* Opposite direction */
    margin-top: 25px; /* More space */
}

.gallery-row img {
    width: 280px; /* Larger image size */
    height: 280px;
    object-fit: cover;
    margin: 0 20px; /* More spacing */
    border-radius: var(--border-radius);
    box-shadow: 0 10px 25px var(--shadow-medium); /* Stronger shadow */
    transition: transform 0.25s ease-in-out, box-shadow 0.25s ease-in-out;
    flex-shrink: 0;
    border: 3px solid rgba(255, 255, 255, 0.8); /* Subtle white border for pop */
}

.gallery-row img:hover {
    transform: scale(1.07); /* More pronounced scale */
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.25);
}

/* Animations for scrolling (adjust speed if needed) */
@keyframes scroll-left {
    0% { transform: translateX(0%); }
    100% { transform: translateX(-50%); }
}

@keyframes scroll-right {
    0% { transform: translateX(-50%); }
    100% { transform: translateX(0%); }
}

/* Pricing Section - Reimagined */
.pricing-reimagined {
    padding: 90px 0;
    background-color: var(--pricing-bg); /* Dark background for this section */
    color: var(--pricing-text-light);
    border-radius: var(--border-radius);
    margin: 60px auto;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4); /* Darker shadow for dark background */
    text-align: center; /* Center everything in this section */
}

.pricing-reimagined h2 {
    color: var(--white); /* White title for this section */
    margin-bottom: 60px;
}

.pricing-content-reimagined {
    display: flex;
    flex-direction: column; /* Stack main card and benefits vertically */
    align-items: center; /* Center items horizontally */
    gap: 60px; /* Space between main card and benefits */
}

.pricing-main-card {
    background: linear-gradient(135deg, #2c2c2e, #3a3a3c); /* Subtle dark gradient for card */
    padding: 60px 40px; /* Ample padding */
    border-radius: 30px; /* More rounded corners for premium feel */
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), /* Stronger, deeper shadow */
                inset 0 0 0 1px rgba(255, 255, 255, 0.1); /* Subtle inner white border */
    display: flex;
    flex-direction: column;
    align-items: center;
    width: clamp(300px, 80%, 600px); /* Responsive width */
    position: relative;
    overflow: hidden; /* For pseudo-elements */
    z-index: 1; /* Ensure it's above potential background effects */
}

/* Abstract background elements for C4D style */
.pricing-main-card::before,
.pricing-main-card::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(80px); /* Soft, diffused glow */
    opacity: 0.4;
    z-index: -1;
}

.pricing-main-card::before {
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, var(--primary-color-start), transparent 70%);
    top: -50px;
    left: -50px;
}

.pricing-main-card::after {
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, var(--primary-color-end), transparent 70%);
    bottom: -50px;
    right: -50px;
}

.price-currency {
    font-size: 2.5em;
    font-weight: 300; /* Lighter weight for currency symbol */
    color: var(--pricing-text-light);
    align-self: flex-start; /* Align currency to start */
    margin-bottom: -0.15em; /* Pull closer to number */
    margin-left: 20px; /* Indent slightly */
}

.price-value {
    font-size: 7em; /* Extremely large price */
    font-weight: 200; /* Very light weight for the main number */
    letter-spacing: -0.05em; /* Tighter spacing */
    color: var(--pricing-text-light); /* White for the number */
    line-height: 1; /* Remove extra line height */
    text-shadow: 0 0 30px rgba(255, 255, 255, 0.15); /* Subtle glow effect */
}

.price-unit {
    font-size: 1.8em;
    font-weight: 400;
    color: var(--pricing-text-light);
    align-self: flex-end; /* Align unit to end */
    margin-top: -0.5em; /* Pull closer to number */
    margin-right: 20px; /* Indent slightly */
}

/* TEXT STYLES SWAP */
.limit-text {
    /* This now takes the style originally intended for .fee-text (highlighted) */
    font-size: 1.25em;
    color: var(--primary-color-end); /* Highlighted color */
    font-weight: 500; /* Bolded */
    margin-top: 30px;
    line-height: 1.4;
    max-width: 80%;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.fee-text {
    /* This now takes the style originally intended for .limit-text (dimmed) */
    font-size: 1.25em;
    color: var(--pricing-text-dim); /* Dimmer text color */
    font-weight: 400; /* Regular weight */
    margin-top: 15px;
    line-height: 1.4;
    max-width: 80%;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}


/* BENEFIT ICON STYLING */
.pricing-benefits {
    display: flex;
    flex-direction: column;
    gap: 25px; /* Space between benefit items */
    width: clamp(300px, 80%, 800px); /* Responsive width */
    margin-top: 40px; /* Space from the main card */
}

.benefit-item {
    display: flex;
    flex-direction: column; /* Stack icon and text vertically for better centering */
    align-items: center; /* Center horizontally */
    gap: 15px; /* Space between icon and text */
    padding: 0;
    margin-bottom: 25px; /* Space between individual benefit items */
    transition: transform var(--transition-speed); /* Keep hover effect */
    cursor: default; /* Remove pointer cursor as it's not a button */
}

.benefit-item:hover {
    transform: translateY(-5px); /* Keep lift effect */
}

.benefit-icon {
    font-size: 2.8em;
    color: transparent; /* Make the fill transparent */

    /* Simulate gradient stroke using multiple text-shadows */
    /* This creates an outline with stepping colors simulating a gradient */
    text-shadow:
        -1px -1px 0px var(--primary-color-start), /* Top-left, start color */
        1px -1px 0px var(--primary-color-end),   /* Top-right, end color */
        -1px 1px 0px var(--primary-color-start),  /* Bottom-left, start color */
        1px 1px 0px var(--primary-color-end),    /* Bottom-right, end color */
        
        /* Added slightly larger offsets for a more pronounced "gradient" effect */
        -2px -2px 0px var(--primary-color-start),
        2px -2px 0px var(--primary-color-end),
        -2px 2px 0px var(--primary-color-start),
        2px 2px 0px var(--primary-color-end);

    min-width: 40px;
    text-align: center;
}

.benefit-item p {
    font-size: 1.4em; /* Significantly larger font for prominence */
    color: var(--pricing-text-light);
    line-height: 1.6;
    margin-bottom: 0; /* Remove default paragraph margin */
    text-align: center; /* Ensure text is centered */
    max-width: 90%; /* Constrain text width for better readability */
    margin-left: auto;
    margin-right: auto;
}

/* Footer */
footer {
    background-color: var(--secondary-color);
    color: var(--medium-grey);
    padding: 35px 0; /* More padding */
    text-align: center;
    font-size: 0.95em;
    letter-spacing: 0.02em;
}

/* Header Scrolled Effect */
header.scrolled {
    background-color: rgba(255, 255, 255, 0.9); /* Slightly less transparent */
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12); /* Stronger, diffused shadow */
    backdrop-filter: blur(8px); /* More blur for iOS feel */
}

/* Responsive adjustments */
@media (max-width: 1200px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr); /* 2 columns on medium screens */
    }
}

@media (max-width: 992px) {
    .hero-banner {
        height: 500px;
        padding-top: 100px;
    }
    .hero-banner h1 {
        font-size: 2.8em; /* Adjusted font size for smaller screens to ensure one line */
    }
    .hero-banner p {
        font-size: 1.2em;
    }
    nav ul {
        display: none; /* Hide navigation on small screens, can add a hamburger menu */
    }
    .header-content {
        justify-content: space-between; /* Maintain spacing */
    }
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .pricing-main-card {
        padding: 50px 30px;
    }
    .price-value {
        font-size: 6em;
    }
    .benefit-item p {
        font-size: 1.3em; /* Adjust for smaller screens */
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.2em; /* Further reduce font size for very small screens */
        white-space: normal; /* Allow banner title to wrap on very small screens if necessary */
    }
    h2 {
        font-size: 2.2em;
    }
    .cta-button {
        padding: 14px 28px;
        font-size: 1.05em;
    }
    .hero-banner {
        height: 450px;
    }
    .hero-banner p {
        font-size: 1.1em;
    }
    .logo-title {
        gap: 10px;
    }
    .site-title {
        font-size: 1.2em;
    }
    .feature-grid {
        grid-template-columns: 1fr; /* Single column on small screens */
    }
    .gallery-row img {
        width: 220px;
        height: 220px;
        margin: 0 15px;
    }
    .pricing-main-card {
        width: 90%;
        padding: 40px 25px;
    }
    .price-value {
        font-size: 5em;
    }
    .price-currency, .price-unit {
        font-size: 2em;
    }
    .limit-text, .fee-text {
        font-size: 1.1em;
    }
    .pricing-benefits {
        width: 90%;
    }
    .benefit-item {
        gap: 10px;
        margin-bottom: 20px;
    }
    .benefit-icon {
        font-size: 2.2em;
    }
    .benefit-item p {
        font-size: 1.1em;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    h1 {
        font-size: 1.8em; /* Smallest font size for banner title */
    }
    h2 {
        font-size: 1.8em;
    }
    .hero-banner {
        height: 380px;
    }
    .hero-banner p {
        font-size: 0.95em;
        margin-bottom: 25px;
    }
    .logo-title img {
        height: 38px;
    }
    .site-title {
        font-size: 1em;
    }
    .cta-button {
        padding: 10px 20px;
        font-size: 0.95em;
    }
    .feature-item {
        padding: 25px;
    }
    .feature-item i {
        font-size: 3em;
    }
    .feature-item h3 {
        font-size: 1.4em;
    }
    .gallery-row img {
        width: 160px;
        height: 160px;
        margin: 0 10px;
    }
    .pricing-main-card {
        padding: 30px 15px;
    }
    .price-value {
        font-size: 4em;
    }
    .price-currency, .price-unit {
        font-size: 1.5em;
    }
    .limit-text, .fee-text {
        font-size: 0.95em;
    }
    .benefit-item {
        gap: 8px;
        margin-bottom: 15px;
    }
    .benefit-icon {
        font-size: 1.8em;
    }
    .benefit-item p {
        font-size: 0.9em;
    }
}